我怎么能在php中添加“/”到preg_match？

I have this code:

preg_match("/[^-+*%0-9]+/", $your_string, $matches)

It works great but I would like to be able to add the "/" character and I don't know how.

You can use a different pattern delimiter, such as a hash, instead of a forward slash, and then just match the forward slash like any other character:

preg_match('#^/#', $subject);

Such expressions needs to escaped, so you can use it like the following:

 preg_match("/[^-+\/*%0-9]+/", $your_string, $matches)