What potential issues can arise when using array_unique in PHP to filter search results?

Using array_unique in PHP to filter search results may cause unexpected behavior if the array contains mixed data types or complex nested arrays. To avoid this issue, it's recommended to use array_map with a callback function to convert the array elements to a string before applying array_unique.

// Filter search results using array_unique with array_map
$searchResults = [...]; // Your search results array

// Convert array elements to strings before applying array_unique
$filteredResults = array_unique(array_map('strval', $searchResults));