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run code in 300+ PHP versions simultaneously
<?php $x = "hello"; $x += 1; function greet() { echo "Hello!"; } greet();
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 TypeError: Unsupported operand types: string + int in /in/J1YaR:4 Stack trace: #0 {main} thrown in /in/J1YaR on line 4
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
Warning: A non-numeric value encountered in /in/J1YaR on line 4 Hello!
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Hello!

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163.79 ms | 402 KiB | 212 Q