What are some common methods for manipulating arrays in PHP, particularly when crossing elements from multiple arrays?

When crossing elements from multiple arrays in PHP, common methods for manipulating arrays include using functions like array_merge, array_combine, array_intersect, and array_diff to combine, reorganize, or compare elements from different arrays.

// Example of combining elements from multiple arrays using array_merge
$array1 = array('a', 'b', 'c');
$array2 = array(1, 2, 3);
$combinedArray = array_merge($array1, $array2);
print_r($combinedArray);