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run code in 300+ PHP versions simultaneously
<?php $a = 'aaa'; $b = 'ahoj aaa'; echo substr($b, 0, -strlen($a - 1)); echo "\n"; echo substr($b, 0, -strlen($a - 1));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /in/lMUDH:5 Stack trace: #0 {main} thrown in /in/lMUDH on line 5
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 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/lMUDH on line 5 ahoj a Warning: A non-numeric value encountered in /in/lMUDH on line 7 ahoj a
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 - 5.6.28, 7.0.0 - 7.0.20
ahoj a ahoj a

preferences:
267.08 ms | 403 KiB | 372 Q