Users writing an article have the option to write some tags, tags are written like this:

tag1, tag2, tag3

So tags are stored like: $tags = "tag1, tag2, tag3";

I want to make sure, every tag has a minimum of 3 characters, so i need to validate the tags.

I have tried this:

$tagsstring = explode(",", $tags);

$tagslength = array_map('strlen', $tagsstring);

if (min($tagslength) < 3) {
echo "Error... Each tag has to be at least 3 characters.";
}

It seems to work, sometimes... But of you write:

tag1, df

It wont give an error.

Any suggestions?