The "bindec()" function converts a binary number to a decimal number.

    bindec(binary_number)

In the above syntax "binary_number" is the binary number to be converted to decimal.

    <?php
    echo bindec("0011") . "<br />";
    echo bindec("01") . "<br />";
    ?>

    3
    1

In the above example, the binary numbers "0011", "01" are converted to decimal numbers "3","1".