What are some common approaches to handling multidimensional arrays in PHP?

When working with multidimensional arrays in PHP, common approaches include using nested loops to iterate through the arrays and access or modify their elements, using functions like array_map() or array_walk_recursive() to perform operations on each element of the array, and using array functions like array_column() or array_merge() to extract or combine data from different dimensions of the array.

// Example: Using nested loops to iterate through a multidimensional array
$multiArray = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
];

foreach($multiArray as $innerArray){
    foreach($innerArray as $element){
        echo $element . " ";
    }
}