3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Asume loginserver as 0 $_POST['loginserver'] = 0; if ($_POST['loginserver'] == 'login'){ print("Left to right conversion bug"); // This should not print } else{ print("Ok"); } // Proper Way $var = "login"; if ($var == $_POST['loginserver']){ print("Welcome"); // This should not print } else{ print("Proper Way"); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
OkProper Way
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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Left to right conversion bugWelcome
preferences:
237.01 ms | 405 KiB | 330 Q