How to add comma (,) and AND (&) atlast using implode

Hi, I see many of them will be thinking how to display array values with comma but to display last one as &. Here is the code where it will list all the array values with comma separated but last value it will replace &.

 $arr = array('red','pink','blue','violet');
$last = array_pop($arr);
$string = count($arr) ? implode(", ", $arr) . "& " . $last : $last;

Output:
 ------------
red, pink, blue &violet

Hope this will be useful.

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