3v4l.org

run code in 300+ PHP versions simultaneously
<?php $vals = array('a', 'b', 'c', 'd', 'e', 'f'); $token = true; $i = 0; $val = a; while($token) { if ($val == 'a') { echo 'a'; } elseif ($val == 'b') { echo 'b'; } elseif ($val == 'c') { echo 'c'; } elseif ($val == 'd') { echo 'd'; } elseif ($val == 'e') { echo 'e'; } elseif ($val == 'f') { echo 'f'; } else { $token = false; } $i++; $val = $vals[$i]; } exit;
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
Fatal error: Uncaught Error: Undefined constant "a" in /in/Suef4:6 Stack trace: #0 {main} thrown in /in/Suef4 on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/Suef4 on line 6 abcdef Notice: Undefined offset: 6 in /in/Suef4 on line 25 Notice: Undefined offset: 7 in /in/Suef4 on line 25
Output for 7.3.32 - 7.3.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/Suef4 on line 6 abcdef
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant a - assumed 'a' in /in/Suef4 on line 6 abcdef Notice: Undefined offset: 6 in /in/Suef4 on line 25 Notice: Undefined offset: 7 in /in/Suef4 on line 25
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
Notice: Use of undefined constant a - assumed 'a' in /in/Suef4 on line 6 abcdef Notice: Undefined offset: 6 in /in/Suef4 on line 25 Notice: Undefined offset: 7 in /in/Suef4 on line 25
preferences:
253.08 ms | 406 KiB | 401 Q