How to escape slashes in regex?

Question

I\'ve made some regex to test for a YouTube embedded video:

/^(http:\\/\\/www\\.youtube\\.com\\/embed\\/)[^\\/\\s\\\\]+$/

It works for what I e

Answer 1

In PHP, you can also use a different regex delimiter:

~^(http://www\.youtube\.com/embed/)[^/\s\\\\]+$~

Answer 2

If you have a string, you will need to escape the backslashes (and quotes) for the string literal. Or, depending on how the function builds the regex from the string, you might not need to escape slashes at all (I don't think so here).

"iframe=-*,src(match=\"/^(http:\\/\\/www\\.youtube\\.com\\/embed\\/)[^\\/\\s\\\\]+$/\")"