When you use this function on an array, it inserts values into that array and increases the length of that array.
Syntax:
array_push($array_name, value1, value2, ...);
Example:
$fruits = array("Apple", "Banana");
array_push($fruits, "Mango", "Orange");
print_r($fruits);
Output:
Array
(
[0] => Apple
[1] => Banana
[2] => Mango
[3] => Orange
)