wp_check_jsonp_callback

函数


wp_check_jsonp_callback ( $callback )
参数
  • (string)
    $callback
    Supplied JSONP callback function name.
    Required: 是
返回值
  • (bool) Whether the callback function name is valid.
定义位置
  • wp-includes/functions.php
    , line 4505
引入
4.6.0
弃用
–

Checks that a JSONP callback is a valid JavaScript callback name.

Only allows alphanumeric characters and the dot character in callback
function names. This helps to mitigate XSS attacks caused by directly
outputting user input.

function wp_check_jsonp_callback( $callback ) {
	if ( ! is_string( $callback ) ) {
		return false;
	}

	preg_replace( '/[^w.]/', '', $callback, -1, $illegal_char_count );

	return 0 === $illegal_char_count;
}
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