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<?php var_export([ // string1, then string2 'a:aa' => strcmp('a', 'aa'), // -1 'aa:a' => strcmp('aa', 'a'), // 1 'a:a' => strcmp('a', 'a'), // 0 'aa:aa' => strcmp('aa', 'aa'), // 0 ]); echo "\n---\n"; $params = [ ['one' => 'a', 'two' => 'aa', 'three' => 'a', 'four' => 'aa'], // string1s ['three' => 'a', 'one' => 'aa', 'four' => 'aa', 'two' => 'a'], // string2s 'strcmp' ]; var_export([ 'udiff' => array_udiff_assoc(...$params), 'uintersect' => array_uintersect_assoc(...$params), ]);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array ( 'a:aa' => -1, 'aa:a' => 1, 'a:a' => 0, 'aa:aa' => 0, ) --- array ( 'udiff' => array ( 'one' => 'a', 'two' => 'aa', ), 'uintersect' => array ( 'three' => 'a', 'four' => 'aa', ), )
preferences:
81.69 ms | 407 KiB | 5 Q