Quick Reference
The PHP array_diff() function compares the values of two or more arrays, and returns an array that contains entries from array1 not in the other array(s).
Only the values are compared. Not the keys.
<?php
$a1 = array('Car 1' => 'Lamborghini','Car 2' => 'Ferrari', 'Car 3' => 'Maserati');
$a2 = array('Car 1' => 'Lamborghini', 'Car 2' => 'Maserati');
$result = array_diff($a1, $a2);
print_r($result);
?>Note
Arrays count starting from zero NOT one. So item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on.
Output
Array ( [Car 2] => Ferrari )Syntax
array_diff(array1, array2, array3, ...)Parameters
| Parameter | Description |
|---|---|
| array1 | The array to compare from (required) |
| array2 | The array to compare against (required) |
| array3, ... | Additional arrays to compare against |
PHP Notes:
- When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.