bindec Binary to decimal numberbindec stringbinary_string Returns the decimal equivalent of the binary number represented by the binary_string argument. bindec converts a binary number to an integer. The largest number that can be converted is 31 bits of 1's or 2147483647 in decimal. As of PHP 4.1.0, this function can also convert larger numbers. It returns float in that case. ]]> The above example will output: See also decbin, octdec, hexdec and base_convert.