3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = "PHP 5"; echo $x."\n"; $x++; echo $x."\n"; $x = "PHP 5"; echo $x."\n"; $x = $x+1; echo $x."\n";
Output for 8.3.0 - 8.3.4
PHP 5 Deprecated: Increment on non-alphanumeric string is deprecated in /in/cR3PR on line 4 PHP 6 PHP 5 Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/cR3PR:9 Stack trace: #0 {main} thrown in /in/cR3PR on line 9
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
PHP 5 PHP 6 PHP 5 Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/cR3PR:9 Stack trace: #0 {main} thrown in /in/cR3PR on line 9
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
PHP 5 PHP 6 PHP 5 Warning: A non-numeric value encountered in /in/cR3PR on line 9 1
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
PHP 5 PHP 6 PHP 5 1

preferences:
317.98 ms | 403 KiB | 454 Q