decbin():Binary equivalent of decimal number

string decbin(int $number);

Example : Decimal to Binary

<?Php
echo decbin(3); // Output 11 
echo "<br>";
echo decbin(35); // Output 100011 
echo "<br>";
echo decbin(100); // Output is 1100100
echo "<br>";
echo decbin(258); // Output is 100000010
echo "<br>";
echo decbin(1000); // Output is 1111101000
echo "<br>";
?>