(PHP 4 >= 4.4.3, PHP 5 >= 5.1.3, PHP 7)
mb_check_encoding — Check if strings are valid for the specified encoding
Checks if the specified byte stream is valid for the specified encoding.
If var
is of type array, all keys and values are
validated recursively.
It is useful to prevent so-called "Invalid Encoding Attack".
var
The byte stream or array to check. If it is omitted, this function checks all the input from the beginning of the request.
encoding
The expected encoding.
Returns TRUE
on success or FALSE
on failure.