What are the best practices for handling and manipulating multidimensional arrays in PHP?

When working with multidimensional arrays in PHP, it is important to use nested loops to iterate through the arrays and access the values. It is also helpful to use functions like array_push() or array_merge() to add elements to the arrays or merge multiple arrays together. Additionally, using functions like array_column() can help extract specific columns from multidimensional arrays.

// Example of iterating through a multidimensional array
$multiArray = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
];

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