can someone check this for me

[chris_s_22]

both of these are suposed to check url is in correct format?

 

this should only alow http:// with domain name

with no folder extentions

if(!preg_match("/^http://[0-9a-zA-Z-.].[a-zA-Z]{2,3}$/", $_POST[linkto]))

 

this should alow as above but with folder ext

if(!preg_match("/^http://(www.[0-9a-zA-Z][0-9a-zA-Z-][0-9a-zA-Z]|[0-9a-zA-Z][0-9a-zA-Z-][0-9a-zA-Z]).[a-zA-Z]{2,3}[0-9a-zA-Z/-_.]$/", $_POST[linkfrom]))

 

[cags]

I'm not entirely sure what your question is so I'm going to go ahead and just make some general comments.

 

1). $_POST[linkto] will (probably) throw a Notice level error. You should really change this to $_POST['linkto'].

2). Your pattern has no repeat metacharacter/sequence for the first character set meaning it will only match against a single character.

3). You then have an unescaped period/fullstop which will allow any single character.

4). You use your delimiter character in your pattern without escaping it.

5). 2 to 3 characters for the top level domain will not allow for urls such as http://something.info, which is a valid URL.

6). By using the exclamation mark, the if statement will only be entered if the string entered doesn't match the pattern.