What is the significance of using uasort and array_slice functions in PHP when sorting and filtering array values based on occurrence count?

When sorting and filtering array values based on occurrence count in PHP, using uasort allows for sorting the array by values while maintaining key association. On the other hand, using array_slice helps in filtering the array based on a specified range of elements. By combining these functions, you can effectively sort the array based on occurrence count and then filter it to get the desired subset of values. 

// Sample array
$array = array("apple", "banana", "apple", "orange", "banana", "apple");

// Count occurrences of each value
$counts = array_count_values($array);

// Sort the array by occurrence count
uasort($counts, function($a, $b) {
    return $b - $a;
});

// Get the top 2 most occurring values
$filteredArray = array_slice(array_keys($counts), 0, 2);

print_r($filteredArray);

Keywords

uasort array_slice PHP sorting filtering

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