. PHP Manual . Prev . Next . (PHP 3 <= 3.0.18, PHP 4 >= 4.0.0) bindec -- Binary to decimal . int bindec ( string binary_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. See also the decbin() function. Prev . Home . Next . base_convert . Up . ceil