Respuesta a: Problema con la biblioteca de ojetos

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#26939

Carlos el rojo
Participante

No me aparece el FUNCTIONS en el editor de wp. Pero si lo abro mediante ftp y miro el código en el dreamweaver, en la línea 1767 me pone:
[code]if ( realpath($path) == $path )[/code]

Vamos que no sé cómo hacer, así que seguiré tu consejo y copio y pego todo el functions.php:

[code]<?php
/**
* Main WordPress API
*
* @package WordPress
*/

/**
* Converts MySQL DATETIME field to user specified date format.
*
* If $dateformatstring has ‘G’ value, then gmmktime() function will be used to
* make the time. If $dateformatstring is set to ‘U’, then mktime() function
* will be used to make the time.
*
* The $translate will only be used, if it is set to true and it is by default
* and if the $wp_locale object has the month and weekday set.
*
* @since 0.71
*
* @param string $dateformatstring Either ‘G’, ‘U’, or php date format.
* @param string $mysqlstring Time from mysql DATETIME field.
* @param bool $translate Optional. Default is true. Will switch format to locale.
* @return string Date formated by $dateformatstring or locale (if available).
*/
function mysql2date( $dateformatstring, $mysqlstring, $translate = true ) {
global $wp_locale;
$m = $mysqlstring;
if ( empty( $m ) )
return false;

if( ‘G’ == $dateformatstring ) {
return gmmktime(
(int) substr( $m, 11, 2 ), (int) substr( $m, 14, 2 ), (int) substr( $m, 17, 2 ),
(int) substr( $m, 5, 2 ), (int) substr( $m, 8, 2 ), (int) substr( $m, 0, 4 )
);
}

$i = mktime(
(int) substr( $m, 11, 2 ), (int) substr( $m, 14, 2 ), (int) substr( $m, 17, 2 ),
(int) substr( $m, 5, 2 ), (int) substr( $m, 8, 2 ), (int) substr( $m, 0, 4 )
);

if( ‘U’ == $dateformatstring )
return $i;

if ( -1 == $i || false == $i )
$i = 0;

if ( !empty( $wp_locale->month ) && !empty( $wp_locale->weekday ) && $translate ) {
$datemonth = $wp_locale->get_month( date( ‘m’, $i ) );
$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
$dateweekday = $wp_locale->get_weekday( date( ‘w’, $i ) );
$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
$datemeridiem = $wp_locale->get_meridiem( date( ‘a’, $i ) );
$datemeridiem_capital = $wp_locale->get_meridiem( date( ‘A’, $i ) );
$dateformatstring = ‘ ‘ . $dateformatstring;
$dateformatstring = preg_replace( "/([^\])D/", "\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])F/", "\1" . backslashit( $datemonth ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])l/", "\1" . backslashit( $dateweekday ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])M/", "\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])a/", "\1" . backslashit( $datemeridiem ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])A/", "\1" . backslashit( $datemeridiem_capital ), $dateformatstring );

$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
}
$j = @date( $dateformatstring, $i );

/*
if ( !$j ) // for debug purposes
echo $i." ".$mysqlstring;
*/

return $j;
}

/**
* Retrieve the current time based on specified type.
*
* The ‘mysql’ type will return the time in the format for MySQL DATETIME field.
* The ‘timestamp’ type will return the current timestamp.
*
* If $gmt is set to either ‘1’ or ‘true’, then both types will use GMT time.
* if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
*
* @since 1.0.0
*
* @param string $type Either ‘mysql’ or ‘timestamp’.
* @param int|bool $gmt Optional. Whether to use GMT timezone. Default is false.
* @return int|string String if $type is ‘gmt’, int if $type is ‘timestamp’.
*/
function current_time( $type, $gmt = 0 ) {
switch ( $type ) {
case ‘mysql’:
return ( $gmt ) ? gmdate( ‘Y-m-d H:i:s’ ) : gmdate( ‘Y-m-d H:i:s’, ( time() + ( get_option( ‘gmt_offset’ ) * 3600 ) ) );
break;
case ‘timestamp’:
return ( $gmt ) ? time() : time() + ( get_option( ‘gmt_offset’ ) * 3600 );
break;
}
}

/**
* Retrieve the date in localized format, based on timestamp.
*
* If the locale specifies the locale month and weekday, then the locale will
* take over the format for the date. If it isn’t, then the date format string
* will be used instead.
*
* @since 0.71
*
* @param string $dateformatstring Format to display the date
* @param int $unixtimestamp Unix timestamp
* @return string The date, translated if locale specifies it.
*/
function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
global $wp_locale;
$i = $unixtimestamp;
// Sanity check for PHP 5.1.0-
if ( false === $i || intval($i) < 0 ) {
if ( ! $gmt )
$i = current_time( ‘timestamp’ );
else
$i = time();
// we should not let date() interfere with our
// specially computed timestamp
$gmt = true;
}

$datefunc = $gmt? ‘gmdate’ : ‘date’;

if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
$datemonth = $wp_locale->get_month( $datefunc( ‘m’, $i ) );
$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
$dateweekday = $wp_locale->get_weekday( $datefunc( ‘w’, $i ) );
$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
$datemeridiem = $wp_locale->get_meridiem( $datefunc( ‘a’, $i ) );
$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( ‘A’, $i ) );
$dateformatstring = ‘ ‘.$dateformatstring;
$dateformatstring = preg_replace( "/([^\])D/", "\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])F/", "\1" . backslashit( $datemonth ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])l/", "\1" . backslashit( $dateweekday ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])M/", "\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])a/", "\1" . backslashit( $datemeridiem ), $dateformatstring );
$dateformatstring = preg_replace( "/([^\])A/", "\1" . backslashit( $datemeridiem_capital ), $dateformatstring );

$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
}
$j = @$datefunc( $dateformatstring, $i );
return $j;
}

/**
* Convert number to format based on the locale.
*
* @since 2.3.0
*
* @param mixed $number The number to convert based on locale.
* @param int $decimals Precision of the number of decimal places.
* @return string Converted number in string format.
*/
function number_format_i18n( $number, $decimals = null ) {
global $wp_locale;
// let the user override the precision only
$decimals = ( is_null( $decimals ) ) ? $wp_locale->number_format[‘decimals’] : intval( $decimals );

return number_format( $number, $decimals, $wp_locale->number_format[‘decimal_point’], $wp_locale->number_format[‘thousands_sep’] );
}

/**
* Convert number of bytes largest unit bytes will fit into.
*
* It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts
* number of bytes to human readable number by taking the number of that unit
* that the bytes will go into it. Supports TB value.
*
* Please note that integers in PHP are limited to 32 bits, unless they are on
* 64 bit architecture, then they have 64 bit size. If you need to place the
* larger size then what PHP integer type will hold, then use a string. It will
* be converted to a double, which should always have 64 bit length.
*
* Technically the correct unit names for powers of 1024 are KiB, MiB etc.
* @link http://en.wikipedia.org/wiki/Byte
*
* @since 2.3.0
*
* @param int|string $bytes Number of bytes. Note max integer size for integers.
* @param int $decimals Precision of number of decimal places.
* @return bool|string False on failure. Number string on success.
*/
function size_format( $bytes, $decimals = null ) {
$quant = array(
// ========================= Origin ====
‘TB’ => 1099511627776, // pow( 1024, 4)
‘GB’ => 1073741824, // pow( 1024, 3)
‘MB’ => 1048576, // pow( 1024, 2)
‘kB’ => 1024, // pow( 1024, 1)
‘B ‘ => 1, // pow( 1024, 0)
);

foreach ( $quant as $unit => $mag )
if ( doubleval($bytes) >= $mag )
return number_format_i18n( $bytes / $mag, $decimals ) . ‘ ‘ . $unit;

return false;
}

/**
* Get the week start and end from the datetime or date string from mysql.
*
* @since 0.71
*
* @param string $mysqlstring Date or datetime field type from mysql.
* @param int $start_of_week Optional. Start of the week as an integer.
* @return array Keys are ‘start’ and ‘end’.
*/
function get_weekstartend( $mysqlstring, $start_of_week = ” ) {
$my = substr( $mysqlstring, 0, 4 ); // Mysql string Year
$mm = substr( $mysqlstring, 8, 2 ); // Mysql string Month
$md = substr( $mysqlstring, 5, 2 ); // Mysql string day
$day = mktime( 0, 0, 0, $md, $mm, $my ); // The timestamp for mysqlstring day.
$weekday = date( ‘w’, $day ); // The day of the week from the timestamp
$i = 86400; // One day
if( !is_numeric($start_of_week) )
$start_of_week = get_option( ‘start_of_week’ );

if ( $weekday < $start_of_week )
$weekday = 7 – $start_of_week – $weekday;

while ( $weekday > $start_of_week ) {
$weekday = date( ‘w’, $day );
if ( $weekday < $start_of_week )
$weekday = 7 – $start_of_week – $weekday;

$day -= 86400;
$i = 0;
}
$week[‘start’] = $day + 86400 – $i;
$week[‘end’] = $week[‘start’] + 604799;
return $week;
}

/**
* Unserialize value only if it was serialized.
*
* @since 2.0.0
*
* @param string $original Maybe unserialized original, if is needed.
* @return mixed Unserialized data can be any type.
*/
function maybe_unserialize( $original ) {
if ( is_serialized( $original ) ) // don’t attempt to unserialize data that wasn’t serialized going in
if ( false !== $gm = @unserialize( $original ) )
return $gm;
return $original;
}

/**
* Check value to find if it was serialized.
*
* If $data is not an string, then returned value will always be false.
* Serialized data is always a string.
*
* @since 2.0.5
*
* @param mixed $data Value to check to see if was serialized.
* @return bool False if not serialized and true if it was.
*/
function is_serialized( $data ) {
// if it isn’t a string, it isn’t serialized
if ( !is_string( $data ) )
return false;
$data = trim( $data );
if ( ‘N;’ == $data )
return true;
if ( !preg_match( ‘/^([adObis]):/’, $data, $badions ) )
return false;
switch ( $badions[1] ) {
case ‘a’ :
case ‘O’ :
case ‘s’ :
if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]$/s", $data ) )
return true;
break;
case ‘b’ :
case ‘i’ :
case ‘d’ :
if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;$/", $data ) )
return true;
break;
}
return false;
}

/**
* Check whether serialized data is of string type.
*
* @since 2.0.5
*
* @param mixed $data Serialized data
* @return bool False if not a serialized string, true if it is.
*/
function is_serialized_string( $data ) {
// if it isn’t a string, it isn’t a serialized string
if ( !is_string( $data ) )
return false;
$data = trim( $data );
if ( preg_match( ‘/^s:[0-9]+:.*;$/s’, $data ) ) // this should fetch all serialized strings
return true;
return false;
}

/**
* Retrieve option value based on setting name.
*
* If the option does not exist or does not have a value, then the return value
* will be false. This is useful to check whether you need to install an option
* and is commonly used during installation of plugin options and to test
* whether upgrading is required.
*
* You can "short-circuit" the retrieval of the option from the database for
* your plugin or core options that aren’t protected. You can do so by hooking
* into the ‘pre_option_$option’ with the $option being replaced by the option
* name. You should not try to override special options, but you will not be
* prevented from doing so.
*
* There is a second filter called ‘option_$option’ with the $option being
* replaced with the option name. This gives the value as the only parameter.
*
* If the option was serialized, when the option was added and, or updated, then
* it will be unserialized, when it is returned.
*
* @since 1.5.0
* @package WordPress
* @subpackage Option
* @uses apply_filters() Calls ‘pre_option_$optionname’ false to allow
* overwriting the option value in a plugin.
* @uses apply_filters() Calls ‘option_$optionname’ with the option name value.
*
* @param string $setting Name of option to retrieve. Should already be SQL-escaped
* @return mixed Value set for the option.
*/
function get_option( $setting, $default = false ) {
global $wpdb;

// Allow plugins to short-circuit options.
$pre = apply_filters( ‘pre_option_’ . $setting, false );
if ( false !== $pre )
return $pre;

// prevent non-existent options from triggering multiple queries
$notoptions = wp_cache_get( ‘notoptions’, ‘options’ );
if ( isset( $notoptions[$setting] ) )
return $default;

$alloptions = wp_load_alloptions();

if ( isset( $alloptions[$setting] ) ) {
$value = $alloptions[$setting];
} else {
$value = wp_cache_get( $setting, ‘options’ );

if ( false === $value ) {
if ( defined( ‘WP_INSTALLING’ ) )
$suppress = $wpdb->suppress_errors();
// expected_slashed ($setting)
$row = $wpdb->get_row( "SELECT option_value FROM $wpdb->options WHERE option_name = ‘$setting’ LIMIT 1" );
if ( defined( ‘WP_INSTALLING’ ) )
$wpdb->suppress_errors($suppress);

if ( is_object( $row) ) { // Has to be get_row instead of get_var because of funkiness with 0, false, null values
$value = $row->option_value;
wp_cache_add( $setting, $value, ‘options’ );
} else { // option does not exist, so we must cache its non-existence
$notoptions[$setting] = true;
wp_cache_set( ‘notoptions’, $notoptions, ‘options’ );
return $default;
}
}
}

// If home is not set use siteurl.
if ( ‘home’ == $setting && ” == $value )
return get_option( ‘siteurl’ );

if ( in_array( $setting, array(‘siteurl’, ‘home’, ‘category_base’, ‘tag_base’) ) )
$value = untrailingslashit( $value );

return apply_filters( ‘option_’ . $setting, maybe_unserialize( $value ) );
}

/**
* Protect WordPress special option from being modified.
*
* Will die if $option is in protected list. Protected options are ‘alloptions’
* and ‘notoptions’ options.
*
* @since 2.2.0
* @package WordPress
* @subpackage Option
*
* @param string $option Option name.
*/
function wp_protect_special_option( $option ) {
$protected = array( ‘alloptions’, ‘notoptions’ );
if ( in_array( $option, $protected ) )
die( sprintf( __( ‘%s is a protected WP option and may not be modified’ ), wp_specialchars( $option ) ) );
}

/**
* Print option value after sanitizing for forms.
*
* @uses attribute_escape Sanitizes value.
* @since 1.5.0
* @package WordPress
* @subpackage Option
*
* @param string $option Option name.
*/
function form_option( $option ) {
echo attribute_escape (get_option( $option ) );
}

/**
* Retrieve all autoload options or all options, if no autoloaded ones exist.
*
* This is different from wp_load_alloptions() in that this function does not
* cache its results and will retrieve all options from the database every time
*
* it is called.
*
* @since 1.0.0
* @package WordPress
* @subpackage Option
* @uses apply_filters() Calls ‘pre_option_$optionname’ hook with option value as parameter.
* @uses apply_filters() Calls ‘all_options’ on options list.
*
* @return array List of all options.
*/
function get_alloptions() {
global $wpdb;
$show = $wpdb->hide_errors();
if ( !$options = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE autoload = ‘yes’" ) )
$options = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );
$wpdb->show_errors($show);

foreach ( (array) $options as $option ) {
// "When trying to design a foolproof system,
// never underestimate the ingenuity of the fools :)" — Dougal
if ( in_array( $option->option_name, array( ‘siteurl’, ‘home’, ‘category_base’, ‘tag_base’ ) ) )
$option->option_value = untrailingslashit( $option->option_value );
$value = maybe_unserialize( $option->option_value );
$all_options->{$option->option_name} = apply_filters( ‘pre_option_’ . $option->option_name, $value );
}
return apply_filters( ‘all_options’, $all_options );
}

/**
* Loads and caches all autoloaded options, if available or all options.
*
* This is different from get_alloptions(), in that this function will cache the
* options and will return the cached options when called again.
*
* @since 2.2.0
* @package WordPress
* @subpackage Option
*
* @return array List all options.
*/
function wp_load_alloptions() {
global $wpdb;

$alloptions = wp_cache_get( ‘alloptions’, ‘options’ );

if ( !$alloptions ) {
$suppress = $wpdb->suppress_errors();
if ( !$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE autoload = ‘yes’" ) )
$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );
$wpdb->suppress_errors($suppress);
$alloptions = array();
foreach ( (array) $alloptions_db as $o )
$alloptions[$o->option_name] = $o->option_value;
wp_cache_add( ‘alloptions’, $alloptions, ‘options’ );
}
return $alloptions;
}

/**
* Update the value of an option that was already added.
*
* You do not need to serialize values, if the value needs to be serialize, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* If the option does not exist, then the option will be added with the option
* value, but you will not be able to set whether it is autoloaded. If you want
* to set whether an option autoloaded, then you need to use the add_option().
*
* When the option is updated, then the filter named
* ‘update_option_$option_name’, with the $option_name as the $option_name
* parameter value, will be called. The hook should accept two parameters, the
* first is the old parameter and the second is the new parameter.
*
* @since 1.0.0
* @package WordPress
* @subpackage Option
*
* @param string $option_name Option name. Expected to not be SQL-escaped
* @param mixed $newvalue Option value.
* @return bool False if value was not updated and true if value was updated.
*/
function update_option( $option_name, $newvalue ) {
global $wpdb;

wp_protect_special_option( $option_name );

$safe_option_name = $wpdb->escape( $option_name );
$newvalue = sanitize_option( $option_name, $newvalue );

$oldvalue = get_option( $safe_option_name );

$newvalue = apply_filters( ‘pre_update_option_’ . $option_name, $newvalue, $oldvalue );

// If the new and old values are the same, no need to update.
if ( $newvalue === $oldvalue )
return false;

if ( false === $oldvalue ) {
add_option( $option_name, $newvalue );
return true;
}

$notoptions = wp_cache_get( ‘notoptions’, ‘options’ );
if ( is_array( $notoptions ) && isset( $notoptions[$option_name] ) ) {
unset( $notoptions[$option_name] );
wp_cache_set( ‘notoptions’, $notoptions, ‘options’ );
}

$_newvalue = $newvalue;
$newvalue = maybe_serialize( $newvalue );

$alloptions = wp_load_alloptions();
if ( isset( $alloptions[$option_name] ) ) {
$alloptions[$option_name] = $newvalue;
wp_cache_set( ‘alloptions’, $alloptions, ‘options’ );
} else {
wp_cache_set( $option_name, $newvalue, ‘options’ );
}

$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->options SET option_value = %s WHERE option_name = %s", $newvalue, $option_name ) );
if ( $wpdb->rows_affected == 1 ) {
do_action( "update_option_{$option_name}", $oldvalue, $_newvalue );
return true;
}
return false;
}

/**
* Add a new option.
*
* You do not need to serialize values, if the value needs to be serialize, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* You can create options without values and then add values later. Does not
* check whether the option has already been added, but does check that you
* aren’t adding a protected WordPress option. Care should be taken to not name
* options, the same as the ones which are protected and to not add options
* that were already added.
*
* The filter named ‘add_option_$optionname’, with the $optionname being
* replaced with the option’s name, will be called. The hook should accept two
* parameters, the first is the option name, and the second is the value.
*
* @package WordPress
* @subpackage Option
* @since 1.0.0
* @link http://alex.vort-x.net/blog/ Thanks Alex Stapleton
*
* @param string $name Option name to add. Expects to NOT be SQL escaped.
* @param mixed $value Optional. Option value, can be anything.
* @param mixed $deprecated Optional. Description. Not used anymore.
* @param bool $autoload Optional. Default is enabled. Whether to load the option when WordPress starts up.
* @return null returns when finished.
*/
function add_option( $name, $value = ”, $deprecated = ”, $autoload = ‘yes’ ) {
global $wpdb;

wp_protect_special_option( $name );
$safe_name = $wpdb->escape( $name );
$value = sanitize_option( $name, $value );

// Make sure the option doesn’t already exist. We can check the ‘notoptions’ cache before we ask for a db query
$notoptions = wp_cache_get( ‘notoptions’, ‘options’ );
if ( !is_array( $notoptions ) || !isset( $notoptions[$name] ) )
if ( false !== get_option( $safe_name ) )
return;

$value = maybe_serialize( $value );
$autoload = ( ‘no’ === $autoload ) ? ‘no’ : ‘yes’;

if ( ‘yes’ == $autoload ) {
$alloptions = wp_load_alloptions();
$alloptions[$name] = $value;
wp_cache_set( ‘alloptions’, $alloptions, ‘options’ );
} else {
wp_cache_set( $name, $value, ‘options’ );
}

// This option exists now
$notoptions = wp_cache_get( ‘notoptions’, ‘options’ ); // yes, again… we need it to be fresh
if ( is_array( $notoptions ) && isset( $notoptions[$name] ) ) {
unset( $notoptions[$name] );
wp_cache_set( ‘notoptions’, $notoptions, ‘options’ );
}

$wpdb->query( $wpdb->prepare( "INSERT INTO $wpdb->options (option_name, option_value, autoload) VALUES (%s, %s, %s)", $name, $value, $autoload ) );

do_action( "add_option_{$name}", $name, $value );
return;
}

/**
* Removes option by name and prevents removal of protected WordPress options.
*
* @package WordPress
* @subpackage Option
* @since 1.2.0
*
* @param string $name Option name to remove.
* @return bool True, if succeed. False, if failure.
*/
function delete_option( $name ) {
global $wpdb;

wp_protect_special_option( $name );

// Get the ID, if no ID then return
// expected_slashed ($name)
$option = $wpdb->get_row( "SELECT option_id, autoload FROM $wpdb->options WHERE option_name = ‘$name’" );
if ( is_null($option) || !$option->option_id )
return false;
// expected_slashed ($name)
$wpdb->query( "DELETE FROM $wpdb->options WHERE option_name = ‘$name’" );
if ( ‘yes’ == $option->autoload ) {
$alloptions = wp_load_alloptions();
if ( isset( $alloptions[$name] ) ) {
unset( $alloptions[$name] );
wp_cache_set( ‘alloptions’, $alloptions, ‘options’ );
}
} else {
wp_cache_delete( $name, ‘options’ );
}
return true;
}

/**
* Saves and restores user interface settings stored in a cookie.
*
* Checks if the current user-settings cookie is updated and stores it. When no
* cookie exists (different browser used), adds the last saved cookie restoring
* the settings.
*
* @package WordPress
* @subpackage Option
* @since 2.7.0
*/
function wp_user_settings() {

if ( ! is_admin() )
return;

if ( defined(‘DOING_AJAX’) )
return;

if ( ! $user = wp_get_current_user() )
return;

$settings = get_user_option( ‘user-settings’, $user->ID, false );

if ( isset( $_COOKIE[‘wp-settings-‘ . $user->ID] ) ) {
$cookie = preg_replace( ‘/[^A-Za-z0-9=&_]/’, ”, $_COOKIE[‘wp-settings-‘ . $user->ID] );

if ( ! empty( $cookie ) && strpos( $cookie, ‘=’ ) ) {
if ( $cookie == $settings )
return;

$last_time = (int) get_user_option( ‘user-settings-time’, $user->ID, false );
$saved = isset( $_COOKIE[‘wp-settings-time-‘ . $user->ID]) ? preg_replace( ‘/[^0-9]/’, ”, $_COOKIE[‘wp-settings-time-‘ . $user->ID] ) : 0;

if ( $saved > $last_time ) {
update_user_option( $user->ID, ‘user-settings’, $cookie, false );
update_user_option( $user->ID, ‘user-settings-time’, time() – 5, false );
return;
}
}
}

setcookie( ‘wp-settings-‘ . $user->ID, $settings, time() + 31536000, SITECOOKIEPATH );
setcookie( ‘wp-settings-time-‘ . $user->ID, time(), time() + 31536000, SITECOOKIEPATH );
}

/**
* Retrieve user interface setting value based on setting name.
*
* @package WordPress
* @subpackage Option
* @since 2.7.0
*
* @param string $name The name of the setting.
* @param string $default Optional default value to return when $name is not set.
* @return mixed the last saved user setting or the default value/false if it doesn’t exist.
*/
function get_user_setting( $name, $default = false ) {

$arr = get_all_user_settings();

return isset($arr[$name]) ? $arr[$name] : $default;
}

/**
* Delete user interface settings.
*
* Deleting settings would reset them to the defaults.
*
* @package WordPress
* @subpackage Option
* @since 2.7.0
*
* @param mixed $names The name or array of names of the setting to be deleted.
*/
function delete_user_setting( $names ) {
global $current_user;

$arr = get_all_user_settings();
$names = (array) $names;

foreach ( $names as $name ) {
if ( isset($arr[$name]) ) {
unset($arr[$name]);
$settings = ”;
}
}

if ( isset($settings) ) {
foreach ( $arr as $k => $v )
$settings .= $k . ‘=’ . $v . ‘&’;

$settings = rtrim($settings, ‘&’);

update_user_option( $current_user->ID, ‘user-settings’, $settings );
setcookie(‘wp-settings-‘.$current_user->ID, $settings, time() + 31536000, SITECOOKIEPATH);
}
}

/**
* Retrieve all user interface settings.
*
* @package WordPress
* @subpackage Option
* @since 2.7.0
*
* @return array the last saved user settings or empty array.
*/
function get_all_user_settings() {
if ( ! $user = wp_get_current_user() )
return array();

if ( isset($_COOKIE[‘wp-settings-‘.$user->ID]) ) {
$cookie = preg_replace( ‘/[^A-Za-z0-9=&_]/’, ”, $_COOKIE[‘wp-settings-‘.$user->ID] );

if ( $cookie && strpos($cookie, ‘=’) ) { // the ‘=’ cannot be 1st char
parse_str($cookie, $arr);
return $arr;
}
}

return array();
}

/**
* Delete the user settings of the current user.
*
* @package WordPress
* @subpackage Option
* @since 2.7.0
*/
function delete_all_user_settings() {
if ( ! $user = wp_get_current_user() )
return;

delete_usermeta( $user->ID, ‘user-settings’ );
setcookie(‘wp-settings-‘.$user->ID, ‘ ‘, time() – 31536000, SITECOOKIEPATH);
}

/**
* Serialize data, if needed.
*
* @since 2.0.5
*
* @param mixed $data Data that might be serialized.
* @return mixed A scalar data
*/
function maybe_serialize( $data ) {
if ( is_array( $data ) || is_object( $data ) )
return serialize( $data );

if ( is_serialized( $data ) )
return serialize( $data );

return $data;
}

/**
* Strip HTML and put links at the bottom of stripped content.
*
* Searches for all of the links, strips them out of the content, and places
* them at the bottom of the content with numbers.
*
* @since 0.71
*
* @param string $content Content to get links
* @return string HTML stripped out of content with links at the bottom.
*/
function make_url_footnote( $content ) {
preg_match_all( ‘/<a(.+?)href="(.+?)"(.*?)>(.+?)</a>/’, $content, $matches );
$links_summary = "n";
for ( $i=0; $i<count($matches[0]); $i++ ) {
$link_match = $matches[0][$i];
$link_number = ‘[‘.($i+1).’]’;
$link_url = $matches[2][$i];
$link_text = $matches[4][$i];
$content = str_replace( $link_match, $link_text . ‘ ‘ . $link_number, $content );
$link_url = ( ( strtolower( substr( $link_url, 0, 7 ) ) != ‘http://’ ) && ( strtolower( substr( $link_url, 0, 8 ) ) != ‘https://’ ) ) ? get_option( ‘home’ ) . $link_url : $link_url;
$links_summary .= "n" . $link_number . ‘ ‘ . $link_url;
}
$content = strip_tags( $content );
$content .= $links_summary;
return $content;
}

/**
* Retrieve post title from XMLRPC XML.
*
* If the title element is not part of the XML, then the default post title from
* the $post_default_title will be used instead.
*
* @package WordPress
* @subpackage XMLRPC
* @since 0.71
*
* @global string $post_default_title Default XMLRPC post title.
*
* @param string $content XMLRPC XML Request content
* @return string Post title
*/
function xmlrpc_getposttitle( $content ) {
global $post_default_title;
if ( preg_match( ‘/<title>(.+?)</title>/is’, $content, $matchtitle ) ) {
$post_title = $matchtitle[0];
$post_title = preg_replace( ‘/<title>/si’, ”, $post_title );
$post_title = preg_replace( ‘/</title>/si’, ”, $post_title );
} else {
$post_title = $post_default_title;
}
return $post_title;
}

/**
* Retrieve the post category or categories from XMLRPC XML.
*
* If the category element is not found, then the default post category will be
* used. The return type then would be what $post_default_category. If the
* category is found, then it will always be an array.
*
* @package WordPress
* @subpackage XMLRPC
* @since 0.71
*
* @global string $post_default_category Default XMLRPC post category.
*
* @param string $content XMLRPC XML Request content
* @return string|array List of categories or category name.
*/
function xmlrpc_getpostcategory( $content ) {
global $post_default_category;
if ( preg_match( ‘/<category>(.+?)</category>/is’, $content, $matchcat ) ) {
$post_category = trim( $matchcat[1], ‘,’ );
$post_category = explode( ‘,’, $post_category );
} else {
$post_category = $post_default_category;
}
return $post_category;
}

/**
* XMLRPC XML content without title and category elements.
*
* @package WordPress
* @subpackage XMLRPC
* @since 0.71
*
* @param string $content XMLRPC XML Request content
* @return string XMLRPC XML Request content without title and category elements.
*/
function xmlrpc_removepostdata( $content ) {
$content = preg_replace( ‘/<title>(.+?)</title>/si’, ”, $content );
$content = preg_replace( ‘/<category>(.+?)</category>/si’, ”, $content );
$content = trim( $content );
return $content;
}

/**
* Open the file handle for debugging.
*
* This function is used for XMLRPC feature, but it is general purpose enough
* to be used in anywhere.
*
* @see fopen() for mode options.
* @package WordPress
* @subpackage Debug
* @since 0.71
* @uses $debug Used for whether debugging is enabled.
*
* @param string $filename File path to debug file.
* @param string $mode Same as fopen() mode parameter.
* @return bool|resource File handle. False on failure.
*/
function debug_fopen( $filename, $mode ) {
global $debug;
if ( 1 == $debug ) {
$fp = fopen( $filename, $mode );
return $fp;
} else {
return false;
}
}

/**
* Write contents to the file used for debugging.
*
* Technically, this can be used to write to any file handle when the global
* $debug is set to 1 or true.
*
* @package WordPress
* @subpackage Debug
* @since 0.71
* @uses $debug Used for whether debugging is enabled.
*
* @param resource $fp File handle for debugging file.
* @param string $string Content to write to debug file.
*/
function debug_fwrite( $fp, $string ) {
global $debug;
if ( 1 == $debug )
fwrite( $fp, $string );
}

/**
* Close the debugging file handle.
*
* Technically, this can be used to close any file handle when the global $debug
* is set to 1 or true.
*
* @package WordPress
* @subpackage Debug
* @since 0.71
* @uses $debug Used for whether debugging is enabled.
*
* @param resource $fp Debug File handle.
*/
function debug_fclose( $fp ) {
global $debug;
if ( 1 == $debug )
fclose( $fp );
}

/**
* Check content for video and audio links to add as enclosures.
*
* Will not add enclosures that have already been added. This is called as
* pingbacks and trackbacks.
*
* @package WordPress
* @since 1.5.0
*
* @uses $wpdb
*
* @param string $content Post Content
* @param int $post_ID Post ID
*/
function do_enclose( $content, $post_ID ) {
global $wpdb;
include_once( ABSPATH . WPINC . ‘/class-IXR.php’ );

$log = debug_fopen( ABSPATH . ‘enclosures.log’, ‘a’ );
$post_links = array();
debug_fwrite( $log, ‘BEGIN ‘ . date( ‘YmdHis’, time() ) . "n" );

$pung = get_enclosed( $post_ID );

$ltrs = ‘w’;
$gunk = ‘/#~:.?+=&%@!-‘;
$punc = ‘.:?-‘;
$any = $ltrs . $gunk . $punc;

preg_match_all( "{b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp );

debug_fwrite( $log, ‘Post contents:’ );
debug_fwrite( $log, $content . "n" );

foreach ( (array) $post_links_temp[0] as $link_test ) {
if ( !in_array( $link_test, $pung ) ) { // If we haven’t pung it already
$test = parse_url( $link_test );
if ( isset( $test[‘query’] ) )
$post_links[] = $link_test;
elseif ( $test[‘path’] != ‘/’ && $test[‘path’] != ” )
$post_links[] = $link_test;
}
}

foreach ( (array) $post_links as $url ) {
if ( $url != ” && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = ‘enclosure’ AND meta_value LIKE (%s)", $post_ID, $url . ‘%’ ) ) ) {
if ( $headers = wp_get_http_headers( $url) ) {
$len = (int) $headers[‘content-length’];
$type = $wpdb->escape( $headers[‘content-type’] );
$allowed_types = array( ‘video’, ‘audio’ );
if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
$meta_value = "$urln$lenn$typen";
$wpdb->query( $wpdb->prepare( "INSERT INTO $wpdb->postmeta ( post_id , meta_key , meta_value )
VALUES ( %d, ‘enclosure’ , %s)", $post_ID, $meta_value ) );
}
}
}
}
}

/**
* Perform a HTTP HEAD or GET request.
*
* If $file_path is a writable filename, this will do a GET request and write
* the file to that path.
*
* @since 2.5.0
*
* @param string $url URL to fetch.
* @param string|bool $file_path Optional. File path to write request to.
* @param bool $deprecated Deprecated. Not used.
* @return bool|string False on failure and string of headers if HEAD request.
*/
function wp_get_http( $url, $file_path = false, $deprecated = false ) {
@set_time_limit( 60 );

$options = array();
$options[‘redirection’] = 5;

if ( false == $file_path )
$options[‘method’] = ‘HEAD’;
else
$options[‘method’] = ‘GET’;

$response = wp_remote_request($url, $options);

if ( is_wp_error( $response ) )
return false;

$headers = wp_remote_retrieve_headers( $response );
$headers[‘response’] = $response[‘response’][‘code’];

if ( false == $file_path )
return $headers;

// GET request – write it to the supplied filename
$out_fp = fopen($file_path, ‘w’);
if ( !$out_fp )
return $headers;

fwrite( $out_fp, $response[‘body’]);
fclose($out_fp);

return $headers;
}

/**
* Retrieve HTTP Headers from URL.
*
* @since 1.5.1
*
* @param string $url
* @param bool $deprecated Not Used.
* @return bool|string False on failure, headers on success.
*/
function wp_get_http_headers( $url, $deprecated = false ) {
$response = wp_remote_head( $url );

if ( is_wp_error( $response ) )
return false;

return wp_remote_retrieve_headers( $response );
}

/**
* Whether today is a new day.
*
* @since 0.71
* @uses $day Today
* @uses $previousday Previous day
*
* @return int 1 when new day, 0 if not a new day.
*/
function is_new_day() {
global $day, $previousday;
if ( $day != $previousday )
return 1;
else
return 0;
}

/**
* Build URL query based on an associative and, or indexed array.
*
* This is a convenient function for easily building url queries. It sets the
* separator to ‘&’ and uses _http_build_query() function.
*
* @see _http_build_query() Used to build the query
* @link http://us2.php.net/manual/en/function.http-build-query.php more on what
* http_build_query() does.
*
* @since 2.3.0
*
* @param array $data URL-encode key/value pairs.
* @return string URL encoded string
*/
function build_query( $data ) {
return _http_build_query( $data, null, ‘&’, ”, false );
}

/**
* Retrieve a modified URL query string.
*
* You can rebuild the URL and append a new query variable to the URL query by
* using this function. You can also retrieve the full URL with query data.
*
* Adding a single key & value or an associative array. Setting a key value to
* emptystring removes the key. Omitting oldquery_or_uri uses the $_SERVER
* value.
*
* @since 1.5.0
*
* @param mixed $param1 Either newkey or an associative_array
* @param mixed $param2 Either newvalue or oldquery or uri
* @param mixed $param3 Optional. Old query or uri
* @return string New URL query string.
*/
function add_query_arg() {
$ret = ”;
if ( is_array( func_get_arg(0) ) ) {
if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
$uri = $_SERVER[‘REQUEST_URI’];
else
$uri = @func_get_arg( 1 );
} else {
if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
$uri = $_SERVER[‘REQUEST_URI’];
else
$uri = @func_get_arg( 2 );
}

if ( $frag = strstr( $uri, ‘#’ ) )
$uri = substr( $uri, 0, -strlen( $frag ) );
else
$frag = ”;

if ( preg_match( ‘|^https?://|i’, $uri, $matches ) ) {
$protocol = $matches[0];
$uri = substr( $uri, strlen( $protocol ) );
} else {
$protocol = ”;
}

if ( strpos( $uri, ‘?’ ) !== false ) {
$parts = explode( ‘?’, $uri, 2 );
if ( 1 == count( $parts ) ) {
$base = ‘?’;
$query = $parts[0];
} else {
$base = $parts[0] . ‘?’;
$query = $parts[1];
}
} elseif ( !empty( $protocol ) || strpos( $uri, ‘=’ ) === false ) {
$base = $uri . ‘?’;
$query = ”;
} else {
$base = ”;
$query = $uri;
}

wp_parse_str( $query, $qs );
$qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
if ( is_array( func_get_arg( 0 ) ) ) {
$kayvees = func_get_arg( 0 );
$qs = array_merge( $qs, $kayvees );
} else {
$qs[func_get_arg( 0 )] = func_get_arg( 1 );
}

foreach ( (array) $qs as $k => $v ) {
if ( $v === false )
unset( $qs[$k] );
}

$ret = build_query( $qs );
$ret = trim( $ret, ‘?’ );
$ret = preg_replace( ‘#=(&|$)#’, ‘$1’, $ret );
$ret = $protocol . $base . $ret . $frag;
$ret = rtrim( $ret, ‘?’ );
return $ret;
}

/**
* Removes an item or list from the query string.
*
* @since 1.5.0
*
* @param string|array $key Query key or keys to remove.
* @param bool $query When false uses the $_SERVER value.
* @return string New URL query string.
*/
function remove_query_arg( $key, $query=false ) {
if ( is_array( $key ) ) { // removing multiple keys
foreach ( $key as $k )
$query = add_query_arg( $k, false, $query );
return $query;
}
return add_query_arg( $key, false, $query );
}

/**
* Walks the array while sanitizing the contents.
*
* @uses $wpdb Used to sanitize values
* @since 0.71
*
* @param array $array Array to used to walk while sanitizing contents.
* @return array Sanitized $array.
*/
function add_magic_quotes( $array ) {
global $wpdb;

foreach ( (array) $array as $k => $v ) {
if ( is_array( $v ) ) {
$array[$k] = add_magic_quotes( $v );
} else {
$array[$k] = $wpdb->escape( $v );
}
}
return $array;
}

/**
* HTTP request for URI to retrieve content.
*
* @since 1.5.1
* @uses wp_remote_get()
*
* @param string $uri URI/URL of web page to retrieve.
* @return bool|string HTTP content. False on failure.
*/
function wp_remote_fopen( $uri ) {
$parsed_url = @parse_url( $uri );

if ( !$parsed_url || !is_array( $parsed_url ) )
return false;

$options = array();
$options[‘timeout’] = 10;

$response = wp_remote_get( $uri, $options );

if ( is_wp_error( $response ) )
return false;

return $response[‘body’];
}

/**
* Setup the WordPress query.
*
* @since 2.0.0
*
* @param string $query_vars Default WP_Query arguments.
*/
function wp( $query_vars = ” ) {
global $wp, $wp_query, $wp_the_query;
$wp->main( $query_vars );

if( !isset($wp_the_query) )
$wp_the_query = $wp_query;
}

/**
* Retrieve the description for the HTTP status.
*
* @since 2.3.0
*
* @param int $code HTTP status code.
* @return string Empty string if not found, or description if found.
*/
function get_status_header_desc( $code ) {
global $wp_header_to_desc;

$code = absint( $code );

if ( !isset( $wp_header_to_desc ) ) {
$wp_header_to_desc = array(
100 => ‘Continue’,
101 => ‘Switching Protocols’,

200 => ‘OK’,
201 => ‘Created’,
202 => ‘Accepted’,
203 => ‘Non-Authoritative Information’,
204 => ‘No Content’,
205 => ‘Reset Content’,
206 => ‘Partial Content’,

300 => ‘Multiple Choices’,
301 => ‘Moved Permanently’,
302 => ‘Found’,
303 => ‘See Other’,
304 => ‘Not Modified’,
305 => ‘Use Proxy’,
307 => ‘Temporary Redirect’,

400 => ‘Bad Request’,
401 => ‘Unauthorized’,
403 => ‘Forbidden’,
404 => ‘Not Found’,
405 => ‘Method Not Allowed’,
406 => ‘Not Acceptable’,
407 => ‘Proxy Authentication Required’,
408 => ‘Request Timeout’,
409 => ‘Conflict’,
410 => ‘Gone’,
411 => ‘Length Required’,
412 => ‘Precondition Failed’,
413 => ‘Request Entity Too Large’,
414 => ‘Request-URI Too Long’,
415 => ‘Unsupported Media Type’,
416 => ‘Requested Range Not Satisfiable’,
417 => ‘Expectation Failed’,

500 => ‘Internal Server Error’,
501 => ‘Not Implemented’,
502 => ‘Bad Gateway’,
503 => ‘Service Unavailable’,
504 => ‘Gateway Timeout’,
505 => ‘HTTP Version Not Supported’
);
}

if ( isset( $wp_header_to_desc[$code] ) )
return $wp_header_to_desc[$code];
else
return ”;
}

/**
* Set HTTP status header.
*
* @since 2.0.0
* @uses apply_filters() Calls ‘status_header’ on status header string, HTTP
* HTTP code, HTTP code description, and protocol string as separate
* parameters.
*
* @param int $header HTTP status code
* @return null Does not return anything.
*/
function status_header( $header ) {
$text = get_status_header_desc( $header );

if ( empty( $text ) )
return false;

$protocol = $_SERVER["SERVER_PROTOCOL"];
if ( ‘HTTP/1.1’ != $protocol && ‘HTTP/1.0’ != $protocol )
$protocol = ‘HTTP/1.0’;
$status_header = "$protocol $header $text";
if ( function_exists( ‘apply_filters’ ) )
$status_header = apply_filters( ‘status_header’, $status_header, $header, $text, $protocol );

if ( version_compare( phpversion(), ‘4.3.0’, ‘>=’ ) )
return @header( $status_header, true, $header );
else
return @header( $status_header );
}

/**
* Sets the headers to prevent caching for the different browsers.
*
* Different browsers support different nocache headers, so several headers must
* be sent so that all of them get the point that no caching should occur.
*
* @since 2.0.0
*/
function nocache_headers() {
// why are these @-silenced when other header calls aren’t?
@header( ‘Expires: Wed, 11 Jan 1984 05:00:00 GMT’ );
@header( ‘Last-Modified: ‘ . gmdate( ‘D, d M Y H:i:s’ ) . ‘ GMT’ );
@header( ‘Cache-Control: no-cache, must-revalidate, max-age=0’ );
@header( ‘Pragma: no-cache’ );
}

/**
* Set the headers for caching for 10 days with JavaScript content type.
*
* @since 2.1.0
*/
function cache_javascript_headers() {
$expiresOffset = 864000; // 10 days
header( "Content-Type: text/javascript; charset=" . get_bloginfo( ‘charset’ ) );
header( "Vary: Accept-Encoding" ); // Handle proxies
header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
}

/**
* Retrieve the number of database queries during the WordPress execution.
*
* @since 2.0.0
*
* @return int Number of database queries
*/
function get_num_queries() {
global $wpdb;
return $wpdb->num_queries;
}

/**
* Whether input is yes or no. Must be ‘y’ to be true.
*
* @since 1.0.0
*
* @param string $yn Character string containing either ‘y’ or ‘n’
* @return bool True if yes, false on anything else
*/
function bool_from_yn( $yn ) {
return ( strtolower( $yn ) == ‘y’ );
}

/**
* Loads the feed template from the use of an action hook.
*
* If the feed action does not have a hook, then the function will die with a
* message telling the visitor that the feed is not valid.
*
* It is better to only have one hook for each feed.
*
* @since 2.1.0
* @uses $wp_query Used to tell if the use a comment feed.
* @uses do_action() Calls ‘do_feed_$feed’ hook, if a hook exists for the feed.
*/
function do_feed() {
global $wp_query;

$feed = get_query_var( ‘feed’ );

// Remove the pad, if present.
$feed = preg_replace( ‘/^_+/’, ”, $feed );

if ( $feed == ” || $feed == ‘feed’ )
$feed = get_default_feed();

$hook = ‘do_feed_’ . $feed;
if ( !has_action($hook) ) {
$message = sprintf( __( ‘ERROR: %s is not a valid feed template’ ), wp_specialchars($feed));
wp_die($message);
}

do_action( $hook, $wp_query->is_comment_feed );
}

/**
* Load the RDF RSS 0.91 Feed template.
*
* @since 2.1.0
*/
function do_feed_rdf() {
load_template( ABSPATH . WPINC . ‘/feed-rdf.php’ );
}

/**
* Load the RSS 1.0 Feed Template
*
* @since 2.1.0
*/
function do_feed_rss() {
load_template( ABSPATH . WPINC . ‘/feed-rss.php’ );
}

/**
* Load either the RSS2 comment feed or the RSS2 posts feed.
*
* @since 2.1.0
*
* @param bool $for_comments True for the comment feed, false for normal feed.
*/
function do_feed_rss2( $for_comments ) {
if ( $for_comments )
load_template( ABSPATH . WPINC . ‘/feed-rss2-comments.php’ );
else
load_template( ABSPATH . WPINC . ‘/feed-rss2.php’ );
}

/**
* Load either Atom comment feed or Atom posts feed.
*
* @since 2.1.0
*
* @param bool $for_comments True for the comment feed, false for normal feed.
*/
function do_feed_atom( $for_comments ) {
if ($for_comments)
load_template( ABSPATH . WPINC . ‘/feed-atom-comments.php’);
else
load_template( ABSPATH . WPINC . ‘/feed-atom.php’ );
}

/**
* Display the robot.txt file content.
*
* The echo content should be with usage of the permalinks or for creating the
* robot.txt file.
*
* @since 2.1.0
* @uses do_action() Calls ‘do_robotstxt’ hook for displaying robot.txt rules.
*/
function do_robots() {
header( ‘Content-Type: text/plain; charset=utf-8’ );

do_action( ‘do_robotstxt’ );

if ( ‘0’ == get_option( ‘blog_public’ ) ) {
echo "User-agent: *n";
echo "Disallow: /n";
} else {
echo "User-agent: *n";
echo "Disallow:n";
}
}

/**
* Test whether blog is already installed.
*
* The cache will be checked first. If you have a cache plugin, which saves the
* cache values, then this will work. If you use the default WordPress cache,
* and the database goes away, then you might have problems.
*
* Checks for the option siteurl for whether WordPress is installed.
*
* @since 2.1.0
* @uses $wpdb
*
* @return bool Whether blog is already installed.
*/
function is_blog_installed() {
global $wpdb;

// Check cache first. If options table goes away and we have true cached, oh well.
if ( wp_cache_get(‘is_blog_installed’) )
return true;

$suppress = $wpdb->suppress_errors();
$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = ‘siteurl’" );
$wpdb->suppress_errors($suppress);

$installed = !empty( $installed ) ? true : false;
wp_cache_set(‘is_blog_installed’, $installed);

return $installed;
}

/**
* Retrieve URL with nonce added to URL query.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @param string $actionurl URL to add nonce action
* @param string $action Optional. Nonce action name
* @return string URL with nonce action added.
*/
function wp_nonce_url( $actionurl, $action = -1 ) {
$actionurl = str_replace( ‘&’, ‘&’, $actionurl );
return wp_specialchars( add_query_arg( ‘_wpnonce’, wp_create_nonce( $action ), $actionurl ) );
}

/**
* Retrieve or display nonce hidden field for forms.
*
* The nonce field is used to validate that the contents of the form came from
* the location on the current site and not somewhere else. The nonce does not
* offer absolute protection, but should protect against most cases. It is very
* important to use nonce field in forms.
*
* If you set $echo to true and set $referer to true, then you will need to
* retrieve the {@link wp_referer_field() wp referer field}. If you have the
* $referer set to true and are echoing the nonce field, it will also echo the
* referer field.
*
* The $action and $name are optional, but if you want to have better security,
* it is strongly suggested to set those two parameters. It is easier to just
* call the function without any parameters, because validation of the nonce
* doesn’t require any parameters, but since crackers know what the default is
* it won’t be difficult for them to find a way around your nonce and cause
* damage.
*
* The input name will be whatever $name value you gave. The input value will be
* the nonce creation value.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @param string $action Optional. Action name.
* @param string $name Optional. Nonce name.
* @param bool $referer Optional, default true. Whether to set the referer field for validation.
* @param bool $echo Optional, default true. Whether to display or return hidden form field.
* @return string Nonce field.
*/
function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
$name = attribute_escape( $name );
$nonce_field = ‘<input type="hidden" id="’ . $name . ‘" name="’ . $name . ‘" value="’ . wp_create_nonce( $action ) . ‘" />’;
if ( $echo )
echo $nonce_field;

if ( $referer )
wp_referer_field( $echo, ‘previous’ );

return $nonce_field;
}

/**
* Retrieve or display referer hidden field for forms.
*
* The referer link is the current Request URI from the server super global. The
* input name is ‘_wp_http_referer’, in case you wanted to check manually.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @param bool $echo Whether to echo or return the referer field.
* @return string Referer field.
*/
function wp_referer_field( $echo = true) {
$ref = attribute_escape( $_SERVER[‘REQUEST_URI’] );
$referer_field = ‘<input type="hidden" name="_wp_http_referer" value="’. $ref . ‘" />’;

if ( $echo )
echo $referer_field;
return $referer_field;
}

/**
* Retrieve or display original referer hidden field for forms.
*
* The input name is ‘_wp_original_http_referer’ and will be either the same
* value of {@link wp_referer_field()}, if that was posted already or it will
* be the current page, if it doesn’t exist.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @param bool $echo Whether to echo the original http referer
* @param string $jump_back_to Optional, default is ‘current’. Can be ‘previous’ or page you want to jump back to.
* @return string Original referer field.
*/
function wp_original_referer_field( $echo = true, $jump_back_to = ‘current’ ) {
$jump_back_to = ( ‘previous’ == $jump_back_to ) ? wp_get_referer() : $_SERVER[‘REQUEST_URI’];
$ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to;
$orig_referer_field = ‘<input type="hidden" name="_wp_original_http_referer" value="’ . attribute_escape( stripslashes( $ref ) ) . ‘" />’;
if ( $echo )
echo $orig_referer_field;
return $orig_referer_field;
}

/**
* Retrieve referer from ‘_wp_http_referer’, HTTP referer, or current page respectively.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @return string|bool False on failure. Referer URL on success.
*/
function wp_get_referer() {
$ref = ”;
if ( ! empty( $_REQUEST[‘_wp_http_referer’] ) )
$ref = $_REQUEST[‘_wp_http_referer’];
else if ( ! empty( $_SERVER[‘HTTP_REFERER’] ) )
$ref = $_SERVER[‘HTTP_REFERER’];

if ( $ref !== $_SERVER[‘REQUEST_URI’] )
return $ref;
return false;
}

/**
* Retrieve original referer that was posted, if it exists.
*
* @package WordPress
* @subpackage Security
* @since 2.0.4
*
* @return string|bool False if no original referer or original referer if set.
*/
function wp_get_original_referer() {
if ( !empty( $_REQUEST[‘_wp_original_http_referer’] ) )
return $_REQUEST[‘_wp_original_http_referer’];
return false;
}

/**
* Recursive directory creation based on full path.
*
* Will attempt to set permissions on folders.
*
* @since 2.0.1
*
* @param string $target Full path to attempt to create.
* @return bool Whether the path was created or not. True if path already exists.
*/
function wp_mkdir_p( $target ) {
// from php.net/mkdir user contributed notes
$target = str_replace( ‘//’, ‘/’, $target );
if ( file_exists( $target ) )
return @is_dir( $target );

// Attempting to create the directory may clutter up our display.
if ( @mkdir( $target ) ) {
$stat = @stat( dirname( $target ) );
$dir_perms = $stat[‘mode’] & 0007777; // Get the permission bits.
@chmod( $target, $dir_perms );
return true;
} elseif ( is_dir( dirname( $target ) ) ) {
return false;
}

// If the above failed, attempt to create the parent node, then try again.
if ( ( $target != ‘/’ ) && ( wp_mkdir_p( dirname( $target ) ) ) )
return wp_mkdir_p( $target );

return false;
}

/**
* Test if a give filesystem path is absolute (‘/foo/bar’, ‘c:windows’).
*
* @since 2.5.0
*
* @param string $path File path
* @return bool True if path is absolute, false is not absolute.
*/
function path_is_absolute( $path ) {
// this is definitive if true but fails if $path does not exist or contains a symbolic link
if ( realpath($path) == $path )
return true;

if ( strlen($path) == 0 || $path{0} == ‘.’ )
return false;

// windows allows absolute paths like this
if ( preg_match(‘#^[a-zA-Z]:\\#’, $path) )
return true;

// a path starting with / or is absolute; anything else is relative
return (bool) preg_match(‘#^[/\\]#’, $path);
}

/**
* Join two filesystem paths together (e.g. ‘give me $path relative to $base’).
*
* If the $path is absolute, then it the full path is returned.
*
* @since 2.5.0
*
* @param string $base
* @param string $path
* @return string The path with the base or absolute path.
*/
f

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