PHP » Operators » >>

Syntax:
expression1 >> expression2
expression1
Number to shift.
expression2
Number of steps to shift it.

Shift right.

This operator shifts a binary number a number of steps to the right.

Examples

Code:
<?php

$a = 11;
$b = $a >> 1;

printf("%b >> 1 = %b", $a, $b);

?>
Output:
1011 >> 1 = 101
Explanation:

A number is shifted one step to the right.