Need regex help.

[KuJoe]

So I am trying to find a proper way to use regex in PHP to find if a variable contains "http:/" but not "http://". Basically I have a script that in some rare instances one of the slashes gets removed from a URL so I need to check to see if the slash got removed and add it back if it did.

Any help is appreciated (I suck at regex and Google hasn't been very helpful). Here's the code I have to find "http://" in a variable:

preg_match("#https?://#", $url)

 

[AshleyUK]

In your post your talking about http://, and in your script your talking about https:// by the looks of it.

Which or both are your looking for?

However this should do the trick:


if (!preg_match("~^(?:ht)tps?://~i", $url)) {
"Does not contain http://"
}
,Ashley

 

[KuJoe]

I fixed the part of the script that removed the 2nd slash sometimes (mod_rewrite is even more confusing than regex for me sometimes).

 

[splitice]

preg_match("#https?:/[^/]#", $url)

Will match http:/google.com, https:/google.com

Will not match http://google.com, https://google.com

You can test this with http://rubular.com/

You will need to escape the forward slash delimiter they use.

https?:\/[^\/]

 

[raindog308]

Semi-unrelated trick - in many scripting environments, the slash is arbitrary.

For example, in vi and perl (and probably others) this is valid and works...let's say to replace all instances of http:// with https://


s#http://#https://#g

Makes reading regexes a lot easier and avoids backslashitis.

Not sure about php.

 

[tonyg]

Don't know if you have tried the Regex Coach, but its really useful.

You can test different expressions to see if they match properly.

http://www.weitz.de/regex-coach/

 

[Nikki]

Don't know if you have tried the Regex Coach, but its really useful.

You can test different expressions to see if they match properly.

http://www.weitz.de/regex-coach/

There's also my personal favorite, http://regexr.com/