In PHP, what is the significance of the abschließende Komma (trailing comma) in an array and how can its presence or absence impact the functionality of the code?

The trailing comma in an array is significant because it allows for easier maintenance and readability of code. It also helps prevent syntax errors when adding or removing elements from the array. If the trailing comma is missing and you add a new element to the array, it can lead to syntax errors. To avoid this issue, always include a trailing comma after the last element in an array.

// Incorrect way without trailing comma
$array = [
    'apple',
    'banana',
    'cherry'
];

// Correct way with trailing comma
$array = [
    'apple',
    'banana',
    'cherry',
];