What are some best practices for efficiently filtering and removing duplicate entries in PHP arrays?

When working with PHP arrays, it is common to encounter duplicate entries that need to be filtered out efficiently. One way to achieve this is by using the array_unique() function, which removes duplicate values from an array while preserving the original order. Additionally, you can use the array_values() function to re-index the array after removing duplicates for a clean and organized result.

// Sample PHP code to efficiently filter and remove duplicate entries in an array
$array = [1, 2, 2, 3, 4, 4, 5];

// Remove duplicate entries
$filteredArray = array_unique($array);

// Re-index the array
$filteredArray = array_values($filteredArray);

// Output the filtered array
print_r($filteredArray);