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<?php function array_key_match($target, $match) { $targetKeys = array_keys($target); $diff = array_diff($target, $match); return ($diff == array_diff($diff, $match)); } print_r(array_diff([1, 2, 3, 4], [1, 4])); function test($target, $match, $expect) { return sprintf( "Target %s, Match %s: %s\n", var_export($target, true), var_export($match, true), (array_key_match($target, $match) == $expect) ? 'true' : 'false' ); } print test([1, 2, 3, 4, 5], [2, 3], true); print test(['a', 'b', 'c'], ['c', 'b'], true); print test([1, 2, 3, 4, 5], [4, 5, 6], false);
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 - 7.3.33, 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 ( [1] => 2 [2] => 3 ) Target array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4, 4 => 5, ), Match array ( 0 => 2, 1 => 3, ): true Target array ( 0 => 'a', 1 => 'b', 2 => 'c', ), Match array ( 0 => 'c', 1 => 'b', ): true Target array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4, 4 => 5, ), Match array ( 0 => 4, 1 => 5, 2 => 6, ): false
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 '[', expecting ')' in /in/4ZlSY on line 10
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 '[', expecting ')' in /in/4ZlSY on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/4ZlSY on line 10
Process exited with code 255.

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