(PHP 4 >= 4.4.3, PHP 5 >= 5.1.3, PHP 7, PHP 8)
mb_check_encoding — Check if strings are valid for the specified encoding
$value = null, ?string $encoding = null): bool
Checks if the specified byte stream is valid for the specified encoding.
If value is of type array, all keys and values are
validated recursively.
It is useful to prevent so-called "Invalid Encoding Attack".
valueThe byte stream or array to check. If it is omitted, this function checks all the input from the beginning of the request.
As of PHP 8.1.0, omitting this parameter or passing null is deprecated.
encodingThe expected encoding.
Returns true on success or false on failure.
| Version | Description |
|---|---|
| 8.1.0 |
Calling this function with null as value or without argument is deprecated.
|
| 8.0.0 |
value and encoding are nullable now.
|
| 7.2.0 |
This function now also accepts an array as value.
Formerly, only strings have been supported.
|