(PHP 4 >= 4.4.3, PHP 5 >= 5.1.3)
mb_check_encoding — Check if the string is valid for the specified encoding
$var = NULL
[, string $encoding = mb_internal_encoding()
]] )Checks if the specified byte stream is valid for the specified encoding. It is useful to prevent so-called "Invalid Encoding Attack".
var
The byte stream to check. If it is omitted, this function checks all the input from the beginning of the request.
encoding
The expected encoding.
成功时返回 TRUE， 或者在失败时返回 FALSE.