How can the use of array_pop() and array_shift() functions impact the original array in PHP and what are the alternatives?

Using array_pop() and array_shift() functions can modify the original array by removing elements from the end and beginning respectively. If you want to preserve the original array while still removing elements, you can create a copy of the array and perform the operations on the copy instead.

// Original array
$originalArray = [1, 2, 3, 4, 5];

// Create a copy of the original array
$copyArray = $originalArray;

// Remove elements from the copy array using array_pop() and array_shift()
$removedElementFromEnd = array_pop($copyArray);
$removedElementFromBeginning = array_shift($copyArray);

// Original array remains unchanged
print_r($originalArray);

// Output the modified copy array
print_r($copyArray);