删除特殊字符，逗号分隔文本，PHP

Question

I got my text variable which is user-specified, normally, user should enter the tags which has to look following:

"food, community, relationship"

but if user type for example

"food;;[]'.'.;@$#community,,,-;,,,relationship"

the script should change it into:

"food, community, relationship".

How can I get this done?

Answer 1

how about:

$str = "-----music,,,,,,,,games;'235@#%@#%media";
$arr = preg_split("/\W+/", $str, -1, PREG_SPLIT_NO_EMPTY);
$str = implode(', ', $arr);
echo $str,"
";

output:

music, games, 235, media

You could adapt the \W to which characters you need to keep.