What is an array in PHP?

An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more.

What is array_merge & array_push in PHP?

Description – array_merge () is a PHP language built-in function. $array1 and $array2 are the two arrays we are looking to merge. It combined two single arrays into a single one. Description – Again, array_push () is a PHP language built-in function. $array1 and $array2 are the two arrays we are looking to merge.

What does array_push do in JavaScript?

The array_push () function inserts one or more elements to the end of an array. Tip: You can add one value, or as many as you like. Note: Even if your array has string keys, your added elements will always have numeric keys (See example below). array_push ( array, value1, value2, ... ) Required. Specifies an array Optional.

How to append or merge arrays in PHP?

There are two options to append or merge arrays in PHP: the + operator and the array_merge function. It's not always clear, which one to use. Arrays in PHP are actually ordered maps. We use and think about them as normal arrays and associative arrays. But since the underlying structure is the same, some results might surprise you.