Description
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. 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.
    
     
| Example 1. bindec() example | 
<?phpecho bindec('110011') . "\n";
 echo bindec('000110011') . "\n";
 
 echo bindec('111');
 ?>
 | 
 The above example will output: | 
    
     See also decbin(),
     octdec(),
     hexdec() and
     base_convert().