Regex compilation error [duplicate]

Question

i am searching for a regular expression which removes an x at the beginning of a path. Accepted path separators are \, / and . The path can also start with one of these separators but it don't have to.

According to regexpal it is working but PHP throws the following error:

Compilation failed: missing terminating ] for character class at offset 24

and here is the regex:

/^([\/\.\\]?)X([\/\.\\]{1})/i

What's wrong with this regex?

Answer 1

You are escaping ] at the end

You can instead use preg_quote() which puts a backslash in front of every character that is part of the regular expression syntax.

Also, there's no need to escape .(if it's is in character class)