Online PHP editor | output for WP5B1

<?php echo $a='5.6.2.1', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2a', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2b', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2b0', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2b1', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2b2', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2b3', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.2', ' > ', version_compare($a, '5.6.2.2b2'), "\n"; echo $a='5.6.2.3', ' > ', version_compare($a, '5.6.2.2b2'), "\n";