PHP bindec() Function: Converting Binary Strings to Decimal

The PHP bindec() function converts a binary string to its decimal equivalent, returning an integer or float depending on size.

It interprets the binary string as an unsigned integer, treating the most‑significant bit as a magnitude rather than a sign.

Parameter: $binary_string – the binary string to be converted.

Return value: the decimal value of the binary string.

Example:

<?php
echo bindec('110011') . "
";
echo bindec('000110011') . "
";
echo bindec('111') . "
";
?>

Output:

51
51
7