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run code in 150+ php & hhvm versions
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<?php $data = array( 'field1' => 1, 'field2' => 2, 'field3' => 3, 'field4' => 4 ); $filter = array('field2', 'field3'); $filtered = array_intersect_key(array_flip($filter), $data); var_dump($filtered);
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { ["field2"]=> int(0) ["field3"]=> int(1) }
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_intersect_key() in /in/5DN3P on line 11
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_intersect_key() in /in/5DN3P on line 11
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_intersect_key() in /in/5DN3P on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_intersect_key() in /in/5DN3P on line 11