What are the best practices for debugging PHP scripts when encountering issues with array length or manipulation?

When encountering issues with array length or manipulation in PHP scripts, it's important to first check the length of the array using the `count()` function to ensure it contains the expected number of elements. If the array length is incorrect, you may need to review the code where the array is populated or manipulated to identify any errors. Additionally, using functions like `array_push()` or `array_pop()` to add or remove elements from the array can help maintain its integrity.

// Check the length of the array
$array = [1, 2, 3, 4, 5];
if (count($array) != 5) {
    echo "Array length is incorrect.";
}

// Add an element to the array
array_push($array, 6);

// Remove an element from the array
array_pop($array);