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File: class-wp-scripts.php
<?php
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/**
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* Dependencies API: WP_Scripts class
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*
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* @since 2.6.0
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*
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* @package WordPress
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* @subpackage Dependencies
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*/
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/**
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* Core class used to register scripts.
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*
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* @since 2.1.0
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*
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* @see WP_Dependencies
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*/
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class WP_Scripts extends WP_Dependencies {
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/**
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* Base URL for scripts.
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*
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* Full URL with trailing slash.
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*
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* @since 2.6.0
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* @var string
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*/
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public $base_url;
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/**
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* URL of the content directory.
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*
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* @since 2.8.0
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* @var string
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*/
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public $content_url;
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/**
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* Default version string for scripts.
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*
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* @since 2.6.0
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* @var string
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*/
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public $default_version;
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/**
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* Holds handles of scripts which are enqueued in footer.
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*
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* @since 2.8.0
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* @var array
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*/
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public $in_footer = array();
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/**
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* Holds a list of script handles which will be concatenated.
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*
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* @since 2.8.0
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* @var string
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*/
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public $concat = '';
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/**
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* Holds a string which contains script handles and their version.
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*
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* @since 2.8.0
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* @deprecated 3.4.0
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* @var string
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*/
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public $concat_version = '';
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/**
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* Whether to perform concatenation.
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*
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* @since 2.8.0
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* @var bool
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*/
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public $do_concat = false;
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/**
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* Holds HTML markup of scripts and additional data if concatenation
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* is enabled.
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*
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* @since 2.8.0
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* @var string
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*/
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public $print_html = '';
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/**
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* Holds inline code if concatenation is enabled.
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*
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* @since 2.8.0
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* @var string
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*/
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public $print_code = '';
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/**
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* Holds a list of script handles which are not in the default directory
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* if concatenation is enabled.
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*
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* Unused in core.
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*
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* @since 2.8.0
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* @var string
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*/
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public $ext_handles = '';
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/**
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* Holds a string which contains handles and versions of scripts which
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* are not in the default directory if concatenation is enabled.
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*
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* Unused in core.
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*
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* @since 2.8.0
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* @var string
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*/
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public $ext_version = '';
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/**
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* List of default directories.
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*
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* @since 2.8.0
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* @var array
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*/
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public $default_dirs;
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/**
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* Holds a mapping of dependents (as handles) for a given script handle.
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* Used to optimize recursive dependency tree checks.
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*
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* @since 6.3.0
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* @var array
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*/
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private $dependents_map = array();
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/**
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* Holds a reference to the delayed (non-blocking) script loading strategies.
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* Used by methods that validate loading strategies.
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*
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* @since 6.3.0
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* @var string[]
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*/
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private $delayed_strategies = array( 'defer', 'async' );
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/**
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* Constructor.
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*
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* @since 2.6.0
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*/
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public function __construct() {
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$this->init();
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add_action( 'init', array( $this, 'init' ), 0 );
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}
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/**
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* Initialize the class.
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*
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* @since 3.4.0
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*/
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public function init() {
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/**
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* Fires when the WP_Scripts instance is initialized.
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*
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* @since 2.6.0
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*
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* @param WP_Scripts $wp_scripts WP_Scripts instance (passed by reference).
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*/
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do_action_ref_array( 'wp_default_scripts', array( &$this ) );
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}
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/**
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* Prints scripts.
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*
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* Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.
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*
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* @since 2.1.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @param string|string[]|false $handles Optional. Scripts to be printed: queue (false),
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* single script (string), or multiple scripts (array of strings).
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* Default false.
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* @param int|false $group Optional. Group level: level (int), no groups (false).
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* Default false.
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* @return string[] Handles of scripts that have been printed.
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*/
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public function print_scripts( $handles = false, $group = false ) {
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return $this->do_items( $handles, $group );
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}
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/**
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* Prints extra scripts of a registered script.
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*
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* @since 2.1.0
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* @since 2.8.0 Added the `$display` parameter.
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* @deprecated 3.3.0
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*
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* @see print_extra_script()
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*
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* @param string $handle The script's registered handle.
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* @param bool $display Optional. Whether to print the extra script
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* instead of just returning it. Default true.
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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,
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* true otherwise.
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*/
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public function print_scripts_l10n( $handle, $display = true ) {
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_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );
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return $this->print_extra_script( $handle, $display );
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}
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/**
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* Prints extra scripts of a registered script.
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*
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* @since 3.3.0
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*
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* @param string $handle The script's registered handle.
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* @param bool $display Optional. Whether to print the extra script
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* instead of just returning it. Default true.
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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,
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* true otherwise.
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*/
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public function print_extra_script( $handle, $display = true ) {
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$output = $this->get_data( $handle, 'data' );
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if ( ! $output ) {
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return;
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}
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if ( ! $display ) {
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return $output;
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}
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wp_print_inline_script_tag( $output, array( 'id' => "{$handle}-js-extra" ) );
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return true;
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}
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/**
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* Checks whether all dependents of a given handle are in the footer.
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*
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* If there are no dependents, this is considered the same as if all dependents were in the footer.
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*
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* @since 6.4.0
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*
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* @param string $handle Script handle.
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* @return bool Whether all dependents are in the footer.
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*/
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private function are_all_dependents_in_footer( $handle ) {
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foreach ( $this->get_dependents( $handle ) as $dep ) {
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if ( isset( $this->groups[ $dep ] ) && 0 === $this->groups[ $dep ] ) {
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return false;
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}
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}
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return true;
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}
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/**
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* Processes a script dependency.
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*
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* @since 2.6.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @see WP_Dependencies::do_item()
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*
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* @param string $handle The script's registered handle.
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* @param int|false $group Optional. Group level: level (int), no groups (false).
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function do_item( $handle, $group = false ) {
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if ( ! parent::do_item( $handle ) ) {
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return false;
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}
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if ( 0 === $group && $this->groups[ $handle ] > 0 ) {
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$this->in_footer[] = $handle;
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return false;
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}
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if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {
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$this->in_footer = array_diff( $this->in_footer, (array) $handle );
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}
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$obj = $this->registered[ $handle ];
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if ( null === $obj->ver ) {
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$ver = '';
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} else {
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$ver = $obj->ver ? $obj->ver : $this->default_version;
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}
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if ( isset( $this->args[ $handle ] ) ) {
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$ver = $ver ? $ver . '&amp;' . $this->args[ $handle ] : $this->args[ $handle ];
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}
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$src = $obj->src;
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$strategy = $this->get_eligible_loading_strategy( $handle );
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$intended_strategy = (string) $this->get_data( $handle, 'strategy' );
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$ie_conditional_prefix = '';
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$ie_conditional_suffix = '';
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$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';
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if ( ! $this->is_delayed_strategy( $intended_strategy ) ) {
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$intended_strategy = '';
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}
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/*
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* Move this script to the footer if:
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* 1. The script is in the header group.
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* 2. The current output is the header.
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* 3. The intended strategy is delayed.
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* 4. The actual strategy is not delayed.
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* 5. All dependent scripts are in the footer.
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*/
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if (
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0 === $group &&
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0 === $this->groups[ $handle ] &&
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$intended_strategy &&
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! $this->is_delayed_strategy( $strategy ) &&
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$this->are_all_dependents_in_footer( $handle )
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) {
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$this->in_footer[] = $handle;
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return false;
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}
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if ( $conditional ) {
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$ie_conditional_prefix = "<!--[if {$conditional}]>\n";
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$ie_conditional_suffix = "<![endif]-->\n";
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}
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$before_script = $this->get_inline_script_tag( $handle, 'before' );
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$after_script = $this->get_inline_script_tag( $handle, 'after' );
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if ( $before_script || $after_script ) {
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$inline_script_tag = $ie_conditional_prefix . $before_script . $after_script . $ie_conditional_suffix;
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} else {
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$inline_script_tag = '';
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}
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/*
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* Prevent concatenation of scripts if the text domain is defined
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* to ensure the dependency order is respected.
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*/
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$translations_stop_concat = ! empty( $obj->textdomain );
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$translations = $this->print_translations( $handle, false );
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if ( $translations ) {
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$translations = wp_get_inline_script_tag( $translations, array( 'id' => "{$handle}-js-translations" ) );
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}
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if ( $this->do_concat ) {
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/**
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* Filters the script loader source.
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*
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* @since 2.2.0
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*
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* @param string $src Script loader source path.
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* @param string $handle Script handle.
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*/
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$filtered_src = apply_filters( 'script_loader_src', $src, $handle );
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if (
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$this->in_default_dir( $filtered_src )
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&& ( $before_script || $after_script || $translations_stop_concat || $this->is_delayed_strategy( $strategy ) )
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) {
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$this->do_concat = false;
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// Have to print the so-far concatenated scripts right away to maintain the right order.
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_print_scripts();
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$this->reset();
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} elseif ( $this->in_default_dir( $filtered_src ) && ! $conditional ) {
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$this->print_code .= $this->print_extra_script( $handle, false );
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$this->concat .= "$handle,";
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$this->concat_version .= "$handle$ver";
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return true;
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} else {
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$this->ext_handles .= "$handle,";
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$this->ext_version .= "$handle$ver";
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}
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}
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$has_conditional_data = $conditional && $this->get_data( $handle, 'data' );
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if ( $has_conditional_data ) {
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echo $ie_conditional_prefix;
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}
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$this->print_extra_script( $handle );
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if ( $has_conditional_data ) {
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echo $ie_conditional_suffix;
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}
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// A single item may alias a set of items, by having dependencies, but no source.
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if ( ! $src ) {
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if ( $inline_script_tag ) {
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if ( $this->do_concat ) {
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$this->print_html .= $inline_script_tag;
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} else {
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echo $inline_script_tag;
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}
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}
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return true;
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}
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if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && str_starts_with( $src, $this->content_url ) ) ) {
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$src = $this->base_url . $src;
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}
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if ( ! empty( $ver ) ) {
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$src = add_query_arg( 'ver', $ver, $src );
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}
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/** This filter is documented in wp-includes/class-wp-scripts.php */
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$src = esc_url_raw( apply_filters( 'script_loader_src', $src, $handle ) );
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if ( ! $src ) {
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return true;
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}
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$attr = array(
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'src' => $src,
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'id' => "{$handle}-js",
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);
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if ( $strategy ) {
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$attr[ $strategy ] = true;
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}
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if ( $intended_strategy ) {
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$attr['data-wp-strategy'] = $intended_strategy;
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}
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$tag = $translations . $ie_conditional_prefix . $before_script;
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$tag .= wp_get_script_tag( $attr );
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$tag .= $after_script . $ie_conditional_suffix;
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/**
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* Filters the HTML script tag of an enqueued script.
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*
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* @since 4.1.0
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*
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* @param string $tag The `<script>` tag for the enqueued script.
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* @param string $handle The script's registered handle.
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* @param string $src The script's source URL.
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*/
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$tag = apply_filters( 'script_loader_tag', $tag, $handle, $src );
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if ( $this->do_concat ) {
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$this->print_html .= $tag;
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} else {
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echo $tag;
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}
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return true;
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}
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/**
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* Adds extra code to a registered script.
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*
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* @since 4.5.0
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*
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* @param string $handle Name of the script to add the inline script to.
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* Must be lowercase.
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* @param string $data String containing the JavaScript to be added.
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* @param string $position Optional. Whether to add the inline script
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* before the handle or after. Default 'after'.
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* @return bool True on success, false on failure.
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*/
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public function add_inline_script( $handle, $data, $position = 'after' ) {
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if ( ! $data ) {
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return false;
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}
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if ( 'after' !== $position ) {
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$position = 'before';
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}
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$script = (array) $this->get_data( $handle, $position );
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$script[] = $data;
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return $this->add_data( $handle, $position, $script );
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}
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/**
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* Prints inline scripts registered for a specific handle.
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*
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* @since 4.5.0
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* @deprecated 6.3.0 Use methods get_inline_script_tag() or get_inline_script_data() instead.
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*
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* @param string $handle Name of the script to print inline scripts for.
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* Must be lowercase.
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* @param string $position Optional. Whether to add the inline script
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* before the handle or after. Default 'after'.
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* @param bool $display Optional. Whether to print the script tag
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* instead of just returning the script data. Default true.
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* @return string|false Script data on success, false otherwise.
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*/
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public function print_inline_script( $handle, $position = 'after', $display = true ) {
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_deprecated_function( __METHOD__, '6.3.0', 'WP_Scripts::get_inline_script_data() or WP_Scripts::get_inline_script_tag()' );
[493] Fix | Delete
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$output = $this->get_inline_script_data( $handle, $position );
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if ( empty( $output ) ) {
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return false;
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}
[498] Fix | Delete
[499] Fix | Delete
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Function