>>" in other * languages. * * @param integer $a * @param integer $b * @return integer */ public static function unsignedRightShift($a, $b) { return ( $a >= 0 ? $a >> $b : (($a & 0x7fffffff) >> $b) | (0x40000000 >> ($b - 1)) ); } /** * Gets the number of trailing zeros. * * @param integer $i * @return integer */ public static function numberOfTrailingZeros($i) { $lastPos = strrpos(str_pad(decbin($i), 32, '0', STR_PAD_LEFT), '1'); return $lastPos === false ? 32 : 31 - $lastPos; } }