Online PHP editor | output for TIYrV

<?php var_export([ // string, then mask 'a:ab' => trim('a', 'ab'), // '' ...cast to 0 'ab:a' => trim('ab', 'a'), // 'b' ...cast to 0 '0:1' => trim('0', '1'), // '0' ...cast to 0 '1:0' => trim('1', '0'), // '1' ...cast to 1 ]); echo "\n---\n"; $params = [ ['one' => 'a', 'two' => 'ab', 'three' => '0', 'four' => '1'], // string ['three' => '1', 'one' => 'ab', 'four' => '0', 'two' => 'a'], // mask 'trim' ]; var_export([ 'udiff' => array_udiff_assoc(...$params), 'uintersect' => array_uintersect_assoc(...$params), ]);