Syntax of array_push
int array_push(array &array, mixed value1[, … mixed valueN])
Adds the given values to the end of the array specified in the first argument and returns the new size of the array. Performs the same function as calling $array[] = $value for each of the values in the list
Example of array_push
<?php
$stack = array("orange", "banana");
array_push($stack, "apple", "raspberry");
print_r($stack);
?>
Array ( [0] => orange [1] => banana [2] => apple [3] => raspberry )