原型

json_decode( string $string, bool $assoc_array = false )

参数

$string (string) (Required)

$assoc_array (bool) (Optional)

返回值

(object|array)  

源文件

路径:wp-includes/compat.php

<?php
...
	function json_decode( $string, $assoc_array = false ) {
		global $wp_json;
		if ( ! ($wp_json instanceof Services_JSON ) ) {
			require_once( ABSPATH . WPINC . '/class-json.php' );
			$wp_json = new Services_JSON();
		}
		$res = $wp_json->decode( $string );
		if ( $assoc_array )
			$res = _json_decode_object_helper( $res );
		return $res;
	}
...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/json_decode/