What is the potential issue with using the same array in multiple functions in PHP?

When using the same array in multiple functions in PHP, there is a risk of unintended side effects due to the pass-by-reference nature of arrays in PHP. Modifying the array in one function can affect its values in another function, leading to unexpected behavior. To solve this issue, you can make a copy of the array before passing it to the functions to ensure that each function operates on its own copy of the array.

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

// Function 1
function processArray1($arr) {
    $arrCopy = $arr; // Create a copy of the array
    // Perform operations on $arrCopy
}

// Function 2
function processArray2($arr) {
    $arrCopy = $arr; // Create a copy of the array
    // Perform operations on $arrCopy
}

// Call the functions with the original array
processArray1($data);
processArray2($data);