What are the potential drawbacks of using preg_grep in PHP for searching arrays?

One potential drawback of using preg_grep in PHP for searching arrays is that it can be slower than using simple array functions like array_filter. To improve performance, you can consider using array_filter with a custom callback function that achieves the same result as preg_grep but without the overhead of regular expression matching.

// Example of using array_filter with a custom callback function to search for elements in an array
$array = ['apple', 'banana', 'cherry', 'date'];
$searchTerm = '/^b/';

$result = array_filter($array, function($element) use ($searchTerm) {
    return preg_match($searchTerm, $element);
});

print_r($result);