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#1
February 12th, 2005, 04:28 AM
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PHP code to check, if a text has an url link
I am trying to put together a preg_match statement to check if a submited text has a valid url link.
Code:
if (preg_match('/(www.|)[-0-9A-Z]{2,63}[\.]{1,1}[A-Z]{2,4}(\.[A-Z]{2,4}|)/i',$text,$match)) echo "URL links are not allowed, please remove following URL link from the text: $match[0]<br>";
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#2
February 12th, 2005, 06:30 AM
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Was there a question in there? You seem to have it tied down pretty well. I would probably add http:// as part of the pattern, and use a bit of shorthand to keep things neater, like:
Code:
if (preg_match('/(http:\/\/|)(www.|)[\d\w-]{2,63}\.[A-Z]{2,4}(\.[A-Z]{2,4}|)/i',$text,$match)) echo "URL links are not allowed, please remove following URL link from the text: $match[0]<br>";
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#3
February 14th, 2005, 08:57 AM
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Thanks. I don't know exactly what are the rules for domain names or is there any. What I know is that a domain can be 2-63 marks long, extension 2-4 chars and maximum total length of a domain is 67 marks. I posted the code here, if someone knows more.
URL can be also user.domain.ext or www.user.domain.ext so I added a check for that too. Code:
if (preg_match('/(http:\/\/|)(www.|)([\d\w-]{1,63}\.|)[\d\w-]{2,63}\.[A-Z]{2,4}(\.[A-Z]{2,4}|)/i',$text,$match)) echo "URL links are not allowed, please remove following URL link from the text: $match[0]<br>";
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#4
March 7th, 2005, 03:43 PM
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Similar question
Hello -- I want to do something very similar; I have a PHP app that draws plain text from a DB and renders it. At present, if the plain text contains a URL, the text is just sent to the screen. What I'd like to do is rewrite any URL's in the text as clickable links. Any guidance you can offer would be a big help.
Thanks, Dieter
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