What are the potential pitfalls of using references in PHP functions when dealing with arrays?

When using references in PHP functions with arrays, it's important to be cautious as modifying the referenced array within the function can have unintended side effects outside of the function. To avoid this, consider passing a copy of the array to the function instead of a reference. This way, any modifications made within the function will not affect the original array. 

function modifyArray(array $array) {
    // Make a copy of the array to avoid modifying the original
    $modifiedArray = $array;

    // Modify the copied array as needed
    $modifiedArray[] = "new element";

    return $modifiedArray;
}

$array = [1, 2, 3];
$modifiedArray = modifyArray($array);

print_r($array); // [1, 2, 3]
print_r($modifiedArray); // [1, 2, 3, "new element"]

Keywords

references PHP functions arrays pass by reference potential errors

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