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<?php $foo = ['bar' => 23, 'foo' => 42]; foreach ($foo as &$value) { $value = 33 + "-". $value; } var_dump($foo);
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: int + string in /in/6KKH6:6 Stack trace: #0 {main} thrown in /in/6KKH6 on line 6
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: A non-numeric value encountered in /in/6KKH6 on line 6 Warning: A non-numeric value encountered in /in/6KKH6 on line 6 array(2) { ["bar"]=> string(4) "3323" ["foo"]=> &string(4) "3342" }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
array(2) { ["bar"]=> string(4) "3323" ["foo"]=> &string(4) "3342" }

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