How can you access individual fields within a multidimensional associative array in PHP?

To access individual fields within a multidimensional associative array in PHP, you can use multiple square brackets to navigate through the array keys. Each pair of square brackets represents accessing a specific key within the array. For example, if you have a multidimensional associative array called $data and you want to access a specific field within it, you can use $data['key1']['key2'] to access the value associated with 'key2' within the array associated with 'key1'.

// Sample multidimensional associative array
$data = array(
    'key1' => array(
        'key2' => 'value'
    )
);

// Accessing individual field within the array
$fieldValue = $data['key1']['key2'];
echo $fieldValue; // Output: value