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<?php var_dump(array_intersect_key(array(0=>'0',1=>'1',2=>'2',3=>'3',4=>'4'), array_flip(array(0,2,3))));
based on 6F0eA
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(1) "0" [2]=> string(1) "2" [3]=> string(1) "3" }
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_intersect_key() in /in/9Di2F on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_intersect_key() in /in/9Di2F on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_intersect_key() in /in/9Di2F on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_intersect_key() in /in/9Di2F on line 2