mb_check_encoding

    (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

    Description

    mb_check_encoding(array|string|null $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".

    Parameters

    value

    The byte stream or array to check. If it is omitted, this function checks all the input from the beginning of the request.

    Warning

    As of PHP 8.1.0, omitting this parameter or passing null is deprecated.

    encoding

    The expected encoding.

    Return Values

    Returns true on success or false on failure.

    Changelog

    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.

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