69 lines
1.7 KiB
PHP
69 lines
1.7 KiB
PHP
<?php
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/**
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* Base class for hooking CMB2 into WordPress.
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*
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* @since 2.2.0
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*
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* @category WordPress_Plugin
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* @package CMB2
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* @author WebDevStudios
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* @license GPL-2.0+
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* @link http://webdevstudios.com
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*/
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abstract class CMB2_Hookup_Base {
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/**
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* @var CMB2 object
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* @since 2.0.2
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*/
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protected $cmb;
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/**
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* The object type we are performing the hookup for
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* @var string
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* @since 2.0.9
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*/
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protected $object_type = 'post';
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/**
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* Constructor
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* @since 2.0.0
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* @param CMB2 $cmb The CMB2 object to hookup
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*/
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public function __construct( CMB2 $cmb ) {
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$this->cmb = $cmb;
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$this->object_type = $this->cmb->mb_object_type();
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}
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abstract public function universal_hooks();
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/**
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* Ensures WordPress hook only gets fired once per object.
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* @since 2.0.0
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* @param string $action The name of the filter to hook the $hook callback to.
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* @param callback $hook The callback to be run when the filter is applied.
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* @param integer $priority Order the functions are executed
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* @param int $accepted_args The number of arguments the function accepts.
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*/
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public function once( $action, $hook, $priority = 10, $accepted_args = 1 ) {
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static $hooks_completed = array();
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$args = func_get_args();
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// Get object hash.. This bypasses issues with serializing closures.
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if ( is_object( $hook ) ) {
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$args[1] = spl_object_hash( $args[1] );
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} elseif ( is_array( $hook ) && is_object( $hook[0] ) ) {
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$args[1][0] = spl_object_hash( $hook[0] );
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}
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$key = md5( serialize( $args ) );
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if ( ! isset( $hooks_completed[ $key ] ) ) {
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$hooks_completed[ $key ] = 1;
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add_filter( $action, $hook, $priority, $accepted_args );
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}
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}
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}
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