How to add elements to an empty array in PHP?
If I define an array in PHP such as (I don't define its size):
$cart = array();
Do I simply add elements to it using the following?
$cart[] = 13;
$cart[] = "foo";
$cart[] = obj;
Don't arrays in PHP have an add method, for example, cart.add(13)
?
Solution 1:
Both array_push
and the method you described will work.
$cart = array();
$cart[] = 13;
$cart[] = 14;
// etc
//Above is correct. but below one is for further understanding
$cart = array();
for($i=0;$i<=5;$i++){
$cart[] = $i;
}
echo "<pre>";
print_r($cart);
echo "</pre>";
Is the same as:
<?php
$cart = array();
array_push($cart, 13);
array_push($cart, 14);
// Or
$cart = array();
array_push($cart, 13, 14);
?>
Solution 2:
It's better to not use array_push
and just use what you suggested. The functions just add overhead.
//We don't need to define the array, but in many cases it's the best solution.
$cart = array();
//Automatic new integer key higher than the highest
//existing integer key in the array, starts at 0.
$cart[] = 13;
$cart[] = 'text';
//Numeric key
$cart[4] = $object;
//Text key (assoc)
$cart['key'] = 'test';