hexdec Hexadecimal to decimal &reftitle.description; numberhexdec stringhex_string Returns the decimal equivalent of the hexadecimal number represented by the hex_string argument. hexdec converts a hexadecimal string to a decimal number. hexdec will ignore any non-hexadecimal characters it encounters. As of PHP 7.4.0 supplying any invalid characters is deprecated. &reftitle.parameters; hex_string The hexadecimal string to convert &reftitle.returnvalues; The decimal representation of hex_string &reftitle.changelog; &Version; &Description; 7.4.0 Passing invalid characters will now generate a deprecation notice. The result will still be computed as if the invalid characters did not exist. &reftitle.examples; ]]> &reftitle.notes; The function can convert numbers that are too large to fit into the platforms integer type, larger values are returned as float in that case. &reftitle.seealso; dechex bindec octdec base_convert