No ending delimiter '/' found error

Question

I have adjusted a small script to check backlinks. Yet I keep on getting the error

Warning: preg_match() [function.preg-match]: No ending delimiter \'/\' found in li

Answer 1

It does not have a closing /

preg_match('/ pattern /', $subject);

You have a beginning (slash) / but no closing (slash) /

It looks for the pattern you define in between the 2 slashes.