PHP array_flip: Swap Array Keys & Values

The array_flip function is used to swap the keys and values in an array. Here is how to use it:

$array = array("a" => "apple", "b" => "banana", "c" => "cherry");

$flippedArray = array_flip($array);

print_r($flippedArray);

The output result is:

Array
(
    [apple] => a
    [banana] => b
    [cherry] => c
)

Caution: If the values in the original array are not unique, they may be overwritten when using the array_flip function.