3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = [ [ [ 'foo' => 'bar', 'foobar' => 'foo' ], [ 'foo' => 'bar', 'foobar' => 'foo' ], [ 'foo' => 'bar', 'foobar' => 'foo' ], [ 'foo' => 'foo', 'foobar' => 'bar' ], [ 'foo' => 'foo', 'foobar' => 'bar' ], [ 'foo' => 'foo', 'foobar' => 'bar' ] ] ]; $result = array_map(function($x) { return array_unique($x, SORT_REGULAR); }, $data); print_r($result);

preferences:
26.9 ms | 406 KiB | 5 Q