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<?php $array = array(); var_dump(array_keys($array)); var_dump(array_combine($array, $array));
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 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
array(0) { } array(0) { }
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
array(0) { } Warning: array_combine(): Both parameters should have at least 1 element in /in/HjfsB on line 4 bool(false)
Output for 5.0.0 - 5.0.3
array(0) { } Warning: array_combine(): Both parameters should have number of elements at least 0 in /in/HjfsB on line 4 bool(false)
Output for 4.4.5 - 4.4.9
array(0) { } Fatal error: Call to undefined function: array_combine() in /in/HjfsB on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
array(0) { } Fatal error: Call to undefined function: array_combine() in /in/HjfsB on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
array(0) { } Fatal error: Call to undefined function: array_combine() in /in/HjfsB on line 4

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254.9 ms | 401 KiB | 354 Q