101 lines
2.5 KiB
PHP
101 lines
2.5 KiB
PHP
<?php
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/**
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* Polyfill for SPL autoload feature. This file is separate to prevent compiler notices
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* on the deprecated __autoload() function.
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*
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* See https://core.trac.wordpress.org/ticket/41134
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*
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* @package PHP
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* @access private
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*/
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if ( ! function_exists( 'spl_autoload_register' ) ) {
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$_wp_spl_autoloaders = array();
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/**
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* Autoloader compatibility callback.
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*
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* @since 4.6.0
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*
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* @param string $classname Class to attempt autoloading.
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*/
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function __autoload( $classname ) {
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global $_wp_spl_autoloaders;
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foreach ( $_wp_spl_autoloaders as $autoloader ) {
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if ( ! is_callable( $autoloader ) ) {
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// Avoid the extra warning if the autoloader isn't callable.
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continue;
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}
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call_user_func( $autoloader, $classname );
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// If it has been autoloaded, stop processing.
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if ( class_exists( $classname, false ) ) {
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return;
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}
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}
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}
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/**
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* Registers a function to be autoloaded.
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*
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* @since 4.6.0
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*
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* @param callable $autoload_function The function to register.
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* @param bool $throw Optional. Whether the function should throw an exception
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* if the function isn't callable. Default true.
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* @param bool $prepend Whether the function should be prepended to the stack.
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* Default false.
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*/
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function spl_autoload_register( $autoload_function, $throw = true, $prepend = false ) {
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if ( $throw && ! is_callable( $autoload_function ) ) {
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// String not translated to match PHP core.
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throw new Exception( 'Function not callable' );
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}
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global $_wp_spl_autoloaders;
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// Don't allow multiple registration.
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if ( in_array( $autoload_function, $_wp_spl_autoloaders ) ) {
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return;
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}
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if ( $prepend ) {
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array_unshift( $_wp_spl_autoloaders, $autoload_function );
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} else {
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$_wp_spl_autoloaders[] = $autoload_function;
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}
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}
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/**
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* Unregisters an autoloader function.
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*
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* @since 4.6.0
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*
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* @param callable $function The function to unregister.
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* @return bool True if the function was unregistered, false if it could not be.
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*/
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function spl_autoload_unregister( $function ) {
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global $_wp_spl_autoloaders;
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foreach ( $_wp_spl_autoloaders as &$autoloader ) {
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if ( $autoloader === $function ) {
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unset( $autoloader );
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return true;
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}
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}
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return false;
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}
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/**
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* Retrieves the registered autoloader functions.
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*
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* @since 4.6.0
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*
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* @return array List of autoloader functions.
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*/
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function spl_autoload_functions() {
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return $GLOBALS['_wp_spl_autoloaders'];
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}
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}
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