unsigned_right_shift.php

<?php

/**
 * @file
 * Analogue of JS Unsigned Right Shift Operator (>>>).
 */

/**
 * Shifts $int in binary representation $steps (< 32) bits to the right,
 * discarding bits shifted off, and shifting in zeros from the left.
 *
 * @param int $int
 * @param int $steps
 *
 * @return int
 */
function unsigned_right_shift($int, $steps) {
  return ($int >> $steps) & (pow(2, 32 - $steps) - 1);
}