<?php
/**
* Удалить дубликаты, оставив только уникальные значения
* @param array $array
* @return array
*/
function uniqElements(array $array): array {
return array_unique($array, SORT_REGULAR);
}
//Выходной массив:
/** Array (
* [0] => Array([0] => laravel, [1] => php)
* [1] => Array([0] => codeigniter, [1] => php)
* [3] => Array([0] => c++, [1] => java))
* )
*/
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<?php
$arr = [
['laravel', 'php'],
['codeigniter', 'php'],
['laravel', 'php'],
['c++', 'java'],
];
print_r(uniqElements($arr));
?>
</body>
</html>