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<?php $arr1 = array( foo => 10, bar => 20 ); $arr2 = array( foo => 10, bar => 20 ); var_dump(array_intersect($arr1, $arr2));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant foo - assumed 'foo' in /in/TuHNI on line 4 Notice: Use of undefined constant bar - assumed 'bar' in /in/TuHNI on line 5 Notice: Use of undefined constant foo - assumed 'foo' in /in/TuHNI on line 8 Notice: Use of undefined constant bar - assumed 'bar' in /in/TuHNI on line 9 array(2) { ["foo"]=> int(10) ["bar"]=> int(20) }