3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "\x34\x32\x2E"; echo $a."\n"; echo strlen($a)."\n"; var_dump($a=="42")."\n"; $b = '\x34\x32\x2E'; echo $b."\n"; echo strlen($b)."\n"; var_dump($b=="42")."\n";
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
42. 3 bool(true) \x34\x32\x2E 12 bool(false)

preferences:
315.61 ms | 405 KiB | 462 Q