Hi! Could we please enable some services and cookies to improve your experience and our website?
Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$s = [[1, 2, 3, 4], [1, 2, 3], [3, 5, 6, 7]];
$arr = array_map('unserialize', array_unique(array_map('serialize', $s)));
print_r($arr);
?>