WeberDev.com -> PHP Manual -> Binary to decimal

number 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 or, if needed for size reasons, float.

The decimal value of binary_string

Version	Description
Since 4.1.0	The function can now convert numbers that are too large to fit into the platforms integer type, larger values are returned as float in that case.

Example #1 bindec() example

 <?php
echo bindec('110011') . "\n";
echo bindec('000110011') . "\n";

echo bindec('111');
?>

The above example will output:

  51 51 7

bindec