What is array append in PHP?

PHP itself has various built-in functions to handle the array append functionality. We can add two or more arrays to come up with a new (combination of all) array. The array is helpful when we have two different arrays and want to merge that into a single one for further processing.

Does PHP have to search through an array?

$arr= ['string1'=>$data1, 'string2'=>$data2 etc....] php does *not* have to search through the array comparing each key string to the given key ('string1') one by one, which could take a long time with a large array.

What happens if you push an array onto a stack in PHP?

If you push an array onto the stack, PHP will add the whole array to the next element instead of adding the keys and values to the array. If this is not what you want, you're better off using array_merge () or traverse the array you're pushing on and add each element with $stack [$key] = $value.

How to merge two arrays using PHP array_push() function?

In this example, we will have two arrays and we will try to merge that array using PHP array_merge () function. Using array_push () function, the second one will be merge to the first one. In this function, the second array will be added to the next position of the first array. The complete array will be placed at the next place.