Delete a value from comma separated list

Delete a user id from Php Comma separated values array saved in MySQL.

Use array_search function to delete the user id and it will delete the user id from the comma separated values with the help of unset function.

Demo – Delete a value from comma separated list

<?php
$user_ids = "11,12,13,14,15,16,17,18,19,20";

$user_id_to_delete = 15;

echo "User ID's before delete :" . $user_ids . "\n";

$array_of_user_ids = explode(",",$user_ids);

$user_id_delete_key = array_search($user_id_to_delete,$array_of_user_ids);

unset($array_of_user_ids[$user_id_delete_key]);

$new_user_ids = implode(",",$array_of_user_ids);

echo "User ID's after delete  :" . $new_user_ids . "\n";
?>