3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(null < "-1"); var_dump("" < "-1"); var_dump("" + 0 < "-1");
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
bool(true) bool(true) Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/NXOeS:4 Stack trace: #0 {main} thrown in /in/NXOeS 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
bool(true) bool(true) Warning: A non-numeric value encountered in /in/NXOeS on line 4 bool(false)
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 - 5.6.38, 7.0.0 - 7.0.33
bool(true) bool(true) bool(false)

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260.53 ms | 403 KiB | 454 Q