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<?php function getArray() { return [1, 2, 3]; } function squareArray(array &$a) { foreach ($a as &$v) { $v **= 2; } } // Generates a warning in PHP 7. squareArray((getArray()));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.28, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
Notice: Only variables should be passed by reference in /in/HYONN on line 14
Output for 5.6.0 - 5.6.40, 7.3.32 - 7.3.33
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '*=' (T_MUL_EQUAL) in /in/HYONN on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/HYONN on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/HYONN on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/HYONN on line 4
Process exited with code 255.

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