3v4l.org

run code in 300+ PHP versions simultaneously
<?php print("\"6\" == \" 6\" :"); var_dump("6" == " 6"); print("4.2" == "4.20"); var_dump("4.2" == "4.20"); var_dump("133" == "0133"); var_dump(133 == 0133); var_dump("0x10" == "16"); var_dump("1e3" == "1000");
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 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
"6" == " 6" :bool(true) 1bool(true) bool(true) bool(false) bool(false) bool(true)
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 - 5.5.37, 5.6.0 - 5.6.28
"6" == " 6" :bool(true) 1bool(true) bool(true) bool(false) bool(true) bool(true)

preferences:
232.37 ms | 403 KiB | 346 Q