如何从逗号分隔的字符串中删除单词

Question

I am trying to give my user the ability to add and remove items from a list. the list is formatted like this: item1,item2,item3 each item is separated by a comma, except the last item does not end with one and the first does not start with one. So when my user wants to remove and item for example item3 I need PHP to remove it and the comma before it. If they wanted to remove item2 I need it to also remove the comma before it and the item. If the user wants to remove item1 i need to to remove the item and the comma after it.

Im not using an array because Im storing the the list in a mysql database

This is the code that I've been trying to get to work. It works for every item except for item 1, when I try to remove item1 it can't find it because it is looking for the starting comma not the trailing one.

$skills = 'item1,item2,item3,item4';
$skillToRemove = 'item1';
if(strpos($skills, $skillToRemove . ',') == 1)
    $newSkills = str_replace(',' . $skillToRemove, '', $skills);
else
    $newSkills = str_replace($skillToRemove . ',', '', $skills);
echo $newSkills;

Answer 1

Please don't use a string! Put your items into an array and if you need to print it use implode(). But just put your items into an array like this:

<?php

    $skills = ["item1", "item2", "item3", "item4"];
    $skillToRemove = 'item1';
    unset($skills[array_search($skillToRemove, $skills)]);

?>

And if you want to print your list just do this:

echo implode(",", $skills);