URL Validation HELP!

[Anon]

On my site I have a place for poeple to put links for downloads. I need to some how validate the url so I don't have people entering in tons of false urls. I also need to validate regular urls. Also the urls need to include the http://

thank you in advance to whomever helps

[Anon]

Regular expressions are your friend 🙂 The best way to go about this would be the following:

if (preg_match('/^{http:\/\/([A-Za-z-\.]*)\//',} $url)) {
echo "OK!";
} else {
echo "not ok";
}

Hope that helps! If you need any help with the syntax, goto:

http://www.php.net/manual/en/pcre.pattern.syntax.php

Chris King

[Anon]

Here is little code to check if the linked file exists or not. Found on the php.net page.

$fp = @fopen("$url_from_user","r");
if ($fp){
print "The file exists!";
} else {
print "The file does not exist";
}

Hope this helps you out.

[stephanie]

this is what I used to check sound url:

if (!(ereg("^http://[ ]+(.mp3|.rm|.ra|.ram|.wav|.pls|.mpu|.ims|.wma|.m3u)[^ ]*$",$sound_url)) ) {
print "<p>Invalid sound url";
}