www.gusucode.com > wordpress PHP博客系统英文版 v4.5.1PHP源码程序 > wordpress PHP博客系统英文版 v4.5.1/wordpress/wordpress/wp-includes/functions.wp-scripts.php
<?php
/**
* Dependencies API: Scripts functions
*
* @since 2.6.0
*
* @package WordPress
* @subpackage Dependencies
*/
/**
* Initialize $wp_scripts if it has not been set.
*
* @global WP_Scripts $wp_scripts
*
* @since 4.2.0
*
* @return WP_Scripts WP_Scripts instance.
*/
function wp_scripts() {
global $wp_scripts;
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
$wp_scripts = new WP_Scripts();
}
return $wp_scripts;
}
/**
* Helper function to output a _doing_it_wrong message when applicable.
*
* @ignore
* @since 4.2.0
*
* @param string $function Function name.
*/
function _wp_scripts_maybe_doing_it_wrong( $function ) {
if ( did_action( 'init' ) ) {
return;
}
_doing_it_wrong( $function, sprintf(
__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
'<code>wp_enqueue_scripts</code>',
'<code>admin_enqueue_scripts</code>',
'<code>login_enqueue_scripts</code>'
), '3.3' );
}
/**
* Print scripts in document head that are in the $handles queue.
*
* Called by admin-header.php and wp_head hook. Since it is called by wp_head on every page load,
* the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
* Makes use of already-instantiated $wp_scripts global if present. Use provided wp_print_scripts
* hook to register/enqueue new scripts.
*
* @see WP_Scripts::do_items()
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
*
* @since 2.1.0
*
* @param string|bool|array $handles Optional. Scripts to be printed. Default 'false'.
* @return array On success, a processed array of WP_Dependencies items; otherwise, an empty array.
*/
function wp_print_scripts( $handles = false ) {
/**
* Fires before scripts in the $handles queue are printed.
*
* @since 2.1.0
*/
do_action( 'wp_print_scripts' );
if ( '' === $handles ) { // for wp_head
$handles = false;
}
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
global $wp_scripts;
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
if ( ! $handles ) {
return array(); // No need to instantiate if nothing is there.
}
}
return wp_scripts()->do_items( $handles );
}
/**
* Adds extra code to a registered script.
*
* Code will only be added if the script in already in the queue.
* Accepts a string $data containing the Code. If two or more code blocks
* are added to the same script $handle, they will be printed in the order
* they were added, i.e. the latter added code can redeclare the previous.
*
* @since 4.5.0
*
* @see WP_Scripts::add_inline_script()
*
* @param string $handle Name of the script to add the inline script to.
* @param string $data String containing the javascript to be added.
* @param string $position Optional. Whether to add the inline script before the handle
* or after. Default 'after'.
* @return bool True on success, false on failure.
*/
function wp_add_inline_script( $handle, $data, $position = 'after' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
if ( false !== stripos( $data, '</script>' ) ) {
_doing_it_wrong( __FUNCTION__, __( 'Do not pass script tags to wp_add_inline_script().' ), '4.5.0' );
$data = trim( preg_replace( '#<script[^>]*>(.*)</script>#is', '$1', $data ) );
}
return wp_scripts()->add_inline_script( $handle, $data, $position );
}
/**
* Register a new script.
*
* Registers a script to be enqueued later using the wp_enqueue_script() function.
*
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
*
* @since 2.1.0
* @since 4.3.0 A return value was added.
*
* @param string $handle Name of the script. Should be unique.
* @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
* @param array $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
* Default 'false'.
* @return bool Whether the script has been registered. True on success, false on failure.
*/
function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
$wp_scripts = wp_scripts();
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
$registered = $wp_scripts->add( $handle, $src, $deps, $ver );
if ( $in_footer ) {
$wp_scripts->add_data( $handle, 'group', 1 );
}
return $registered;
}
/**
* Localize a script.
*
* Works only if the script has already been added.
*
* Accepts an associative array $l10n and creates a JavaScript object:
*
* "$object_name" = {
* key: value,
* key: value,
* ...
* }
*
*
* @see WP_Dependencies::localize()
* @link https://core.trac.wordpress.org/ticket/11520
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
*
* @since 2.2.0
*
* @todo Documentation cleanup
*
* @param string $handle Script handle the data will be attached to.
* @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.
* Example: '/[a-zA-Z0-9_]+/'.
* @param array $l10n The data itself. The data can be either a single or multi-dimensional array.
* @return bool True if the script was successfully localized, false otherwise.
*/
function wp_localize_script( $handle, $object_name, $l10n ) {
global $wp_scripts;
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
return false;
}
return $wp_scripts->localize( $handle, $object_name, $l10n );
}
/**
* Remove a registered script.
*
* Note: there are intentional safeguards in place to prevent critical admin scripts,
* such as jQuery core, from being unregistered.
*
* @see WP_Dependencies::remove()
*
* @since 2.1.0
*
* @param string $handle Name of the script to be removed.
*/
function wp_deregister_script( $handle ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
/**
* Do not allow accidental or negligent de-registering of critical scripts in the admin.
* Show minimal remorse if the correct hook is used.
*/
$current_filter = current_filter();
if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||
( 'wp-login.php' === $GLOBALS['pagenow'] && 'login_enqueue_scripts' !== $current_filter )
) {
$no = array(
'jquery', 'jquery-core', 'jquery-migrate', 'jquery-ui-core', 'jquery-ui-accordion',
'jquery-ui-autocomplete', 'jquery-ui-button', 'jquery-ui-datepicker', 'jquery-ui-dialog',
'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-menu', 'jquery-ui-mouse',
'jquery-ui-position', 'jquery-ui-progressbar', 'jquery-ui-resizable', 'jquery-ui-selectable',
'jquery-ui-slider', 'jquery-ui-sortable', 'jquery-ui-spinner', 'jquery-ui-tabs',
'jquery-ui-tooltip', 'jquery-ui-widget', 'underscore', 'backbone',
);
if ( in_array( $handle, $no ) ) {
$message = sprintf( __( 'Do not deregister the %1$s script in the administration area. To target the front-end theme, use the %2$s hook.' ),
"<code>$handle</code>", '<code>wp_enqueue_scripts</code>' );
_doing_it_wrong( __FUNCTION__, $message, '3.6' );
return;
}
}
wp_scripts()->remove( $handle );
}
/**
* Enqueue a script.
*
* Registers the script if $src provided (does NOT overwrite), and enqueues it.
*
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
* @see WP_Dependencies::enqueue()
*
* @since 2.1.0
*
* @param string $handle Name of the script. Should be unique.
* @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
* @param array $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
* Default 'false'.
*/
function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false, $in_footer = false ) {
$wp_scripts = wp_scripts();
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
if ( $src || $in_footer ) {
$_handle = explode( '?', $handle );
if ( $src ) {
$wp_scripts->add( $_handle[0], $src, $deps, $ver );
}
if ( $in_footer ) {
$wp_scripts->add_data( $_handle[0], 'group', 1 );
}
}
$wp_scripts->enqueue( $handle );
}
/**
* Remove a previously enqueued script.
*
* @see WP_Dependencies::dequeue()
*
* @since 3.1.0
*
* @param string $handle Name of the script to be removed.
*/
function wp_dequeue_script( $handle ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
wp_scripts()->dequeue( $handle );
}
/**
* Check whether a script has been added to the queue.
*
* @since 2.8.0
* @since 3.5.0 'enqueued' added as an alias of the 'queue' list.
*
* @param string $handle Name of the script.
* @param string $list Optional. Status of the script to check. Default 'enqueued'.
* Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
* @return bool Whether the script is queued.
*/
function wp_script_is( $handle, $list = 'enqueued' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
return (bool) wp_scripts()->query( $handle, $list );
}
/**
* Add metadata to a script.
*
* Works only if the script has already been added.
*
* Possible values for $key and $value:
* 'conditional' string Comments for IE 6, lte IE 7, etc.
*
* @since 4.2.0
*
* @see WP_Dependency::add_data()
*
* @param string $handle Name of the script.
* @param string $key Name of data point for which we're storing a value.
* @param mixed $value String containing the data to be added.
* @return bool True on success, false on failure.
*/
function wp_script_add_data( $handle, $key, $value ){
return wp_scripts()->add_data( $handle, $key, $value );
}