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<?php function &test($a) { $empty = []; return isset($a) ? $a : $empty; } function &test2($a) { $empty = []; return ${isset($a) ? 'a' : 'empty'}; } $test =& test('123'); print_r($test); $test =& test2('123'); print_r($test); $test =& test(NULL); print_r($test); $test =& test2(NULL); print_r($test);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Notice: Only variable references should be returned by reference in /in/42Cq9 on line 5 123123 Notice: Only variable references should be returned by reference in /in/42Cq9 on line 5 Array ( ) Array ( )
Output for 7.3.32 - 7.3.33
123123Array ( ) Array ( )
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/42Cq9 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/42Cq9 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/42Cq9 on line 4
Process exited with code 255.
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213.98 ms | 401 KiB | 343 Q