3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL|E_STRICT); set_error_handler(function($errno, $errstr) { echo "Handler: $errstr\n";}); @strtolower();
Output for 8.4.1 - 8.4.12
Deprecated: Constant E_STRICT is deprecated in /in/TG8aA on line 3 Fatal error: Uncaught ArgumentCountError: strtolower() expects exactly 1 argument, 0 given in /in/TG8aA:6 Stack trace: #0 /in/TG8aA(6): strtolower() #1 {main} thrown in /in/TG8aA on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25
Fatal error: Uncaught ArgumentCountError: strtolower() expects exactly 1 argument, 0 given in /in/TG8aA:6 Stack trace: #0 /in/TG8aA(6): strtolower() #1 {main} thrown in /in/TG8aA on line 6
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Handler: strtolower() expects exactly 1 parameter, 0 given

preferences:
140.06 ms | 410 KiB | 5 Q