3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "3hello"; $b = "2"; $c = "hello"; echo $a + $b; echo "\n"; echo $b + $a; echo "\n";echo "\n"; echo $c + $b; echo "\n"; echo $b + $c;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: A non-numeric value encountered in /in/IHlOs on line 5 5 Warning: A non-numeric value encountered in /in/IHlOs on line 7 5 Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /in/IHlOs:9 Stack trace: #0 {main} thrown in /in/IHlOs 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 - 7.3.31, 7.4.0 - 7.4.33
Notice: A non well formed numeric value encountered in /in/IHlOs on line 5 5 Notice: A non well formed numeric value encountered in /in/IHlOs on line 7 5 Warning: A non-numeric value encountered in /in/IHlOs on line 9 2 Warning: A non-numeric value encountered in /in/IHlOs on line 11 2
Output for 7.3.32 - 7.3.33
5 5 Warning: A non-numeric value encountered in /in/IHlOs on line 9 2 Warning: A non-numeric value encountered in /in/IHlOs on line 11 2
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
5 5 2 2

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