Everything about Arrays - heikijapan/php-book2 GitHub Wiki

• The more you learn and master arrays the better and dynamic your apps will be.
• Arrays are very good for data analyses as well.

array_values

This generates new array from array that has some unset values.

$cars = ['Toyota', 'Honda', 'Suzuki', 'Nissan'];

// extracts key[0] and it's value, but other keys and values do not shift towards position [0]
unset($cars[0);

// This array has been regenerated and has key[0]
$new_array = array_values($cars)