php - Exclude whole word using regexp

Question

I'd like to exclude word user and gallery using regular expression.

^/(?!user|gallery)([a-z0-9_-]{3,64})$

My regexp also excludes words like mygallery (in which gallery is a substring). I want to have mygallery included.

Thanks a lot in advance.

Answer 1

您的正则表达式应该已经接受mygallery，但它会拒绝username。添加锚以确保它不会：

^/(?!user$|gallery$)([a-z0-9_-]{3,64})$

Answer 2

尝试这个 ：

$str = "mygallery and gallery user and username";
echo preg_replace("/\bgallery\b|\buser\b/","",$str);

输出 ：

mygallery and and username