How to fix Preg_match () warning?

Question

I am using preg_match function to my program like this

(preg_match('/^(f|ht)tps?\://', $this->sourceFilename))

But it shows a warning like this

Warning: preg_match() [function.preg-match]: Unknown modifier '/'

How can it modify? Please help me!!!

Answer 1

The last slash should be escaped

Answer 2

You need to escape the / inside the regexp:

preg_match('/^(f|ht)tps?:\//', $this->sourceFilename)

or use a different delimiter:

preg_match('#^(f|ht)tps?:/#', $this->sourceFilename)

BTW, you don't need to escape :.