What are the potential pitfalls of not properly globalizing an array in PHP?

If an array is not properly globalized in PHP, you may encounter issues when trying to access or modify the array in different scopes or functions. To avoid this, you can use the global keyword to explicitly declare the array as global within the function where you want to access or modify it. 

// Incorrect way of using a global array
$myArray = [1, 2, 3];

function modifyArray() {
    $myArray[] = 4; // This will create a new local variable $myArray
}

// Correct way of globalizing the array
$myArray = [1, 2, 3];

function modifyArray() {
    global $myArray;
    $myArray[] = 4; // This will modify the global $myArray
}

Keywords

scope variable global array localization

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