DaniWeb Forum Index > Web Development > PHP

how to validate a rss feed address

Please support our PHP advertiser: 50% off 6 Months Dedicated Server Hosting from 1&1!

•

Join Date: Jun 2009

Posts: 18

Reputation: ym_chaitu is an unknown quantity at this point

Solved Threads: 0

ym_chaitu

Offline

Newbie Poster

how to validate a rss feed address

Nov 21st, 2009

Hai
i am building a site for validation of the RSS feeds and adding it in the database.
When a user enters a rss web address i need to validate the address and if it contains a rss then i need to enter it into the site or else i need to mention a message..
how do i do it.
i think the easy way is to pass the feed address to this address http://validator.w3.org/feed/check.cgi?url=

but how can i check what result is it giving..
do any one have an idea or else if u have any validation things available. kindly help me out..

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<html>
<body>
<form action="subscription.php" method="post">
<b>Add New Subscription URL :</b><input name="subscr" value="" size="50">
<input type="submit" name="submit" value="Add" />
</form>
</body>
</html>
 
<?php
//include("login.php");
include("access.php");
mysql_select_db($dbname);
if (isset($_COOKIE['user']))
{
	echo "Welcome $_COOKIE[user]<br>";
	$username="$_COOKIE[user]";
	//echo "<p>$username</p>";
	$query = mysql_query("SELECT email,password FROM userlogin WHERE username = '$username'") or die(mysql_error());
	$data = mysql_result($query,0);
	//echo $data;
}
else
{
	echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=login.php\">";
}
 
$subscr=$_REQUEST['subscr'];
if($subscr)
{
	//url validation
 
if (preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $subscr)) 
{
    //print "$subscr url OK.";
	mysql_select_db($dbname);
	$re=mysql_query("select * from usubs where url='$subscr'");
	$rows=mysql_num_rows($re);
	if($rows==0)
		{
			mysql_query("Insert into usubs(email,url) values('$data','$subscr')");	
			//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=all.html\">";
		}
	else
		{
			echo "The $subscr url already exists with your login";
			//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=subscription.php\">";
		}
 
}
 else 
 {
 
    print "$subscr url not valid!";
}
}
else
{ 
	//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=subscription.php\">";
	//echo("$subscr");
}
?>
<html>
<body>
<form action="subscription.php" method="post">
<b>Add New Subscription URL :</b><input name="subscr" value="" size="50">
<input type="submit" name="submit" value="Add" />
</form>
</body>
</html>

<?php
//include("login.php");
include("access.php");
mysql_select_db($dbname);
if (isset($_COOKIE['user']))
{
	echo "Welcome $_COOKIE[user]<br>";
	$username="$_COOKIE[user]";
	//echo "<p>$username</p>";
	$query = mysql_query("SELECT email,password FROM userlogin WHERE username = '$username'") or die(mysql_error());
	$data = mysql_result($query,0);
	//echo $data;
}
else
{
	echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=login.php\">";
}

$subscr=$_REQUEST['subscr'];
if($subscr)
{
	//url validation

if (preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $subscr)) 
{
    //print "$subscr url OK.";
	mysql_select_db($dbname);
	$re=mysql_query("select * from usubs where url='$subscr'");
	$rows=mysql_num_rows($re);
	if($rows==0)
		{
			mysql_query("Insert into usubs(email,url) values('$data','$subscr')");	
			//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=all.html\">";
		}
	else
		{
			echo "The $subscr url already exists with your login";
			//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=subscription.php\">";
		}
	
}
 else 
 {

    print "$subscr url not valid!";
}
}
else
{ 
	//echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=subscription.php\">";
	//echo("$subscr");
}
?>

this is my code
presently i am using the regular expression of the website address but how do i use it to verify the rss feed address..
as the present one is validating the www.google.com also as a valid feed..

http://drvirusindia.co.cc

•

Join Date: Jan 2008

Posts: 146

Reputation: robothy is an unknown quantity at this point

Solved Threads: 20

robothy

Offline

Junior Poster

Nov 21st, 2009

Hey,

Could you not use cURL to read the response from the URL supplied, and then check that it starts with something like the following using regular expressions?

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<?xml version="1.0" encoding="utf-8"?>
 
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/">
<?xml version="1.0" encoding="utf-8"?>

<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/">

Last edited by robothy; Nov 21st, 2009 at 2:50 pm.

•

Join Date: Apr 2009

Posts: 340

Reputation: SKANK!!!!! is an unknown quantity at this point

Solved Threads: 3

SKANK!!!!! SKANK!!!!! is offline

Offline

Posting Whiz

Nov 21st, 2009

do an iframe folks!

•

Join Date: Jan 2008

Posts: 146

Reputation: robothy is an unknown quantity at this point

Solved Threads: 20

robothy

Offline

Junior Poster

Nov 22nd, 2009

Oh and by the way, if you want to do redirects within PHP, try using the Header method instead. E.g.

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
header('Location: target.html');
header('Location: target.html');

•

Join Date: Jun 2009

Posts: 18

Reputation: ym_chaitu is an unknown quantity at this point

Solved Threads: 0

ym_chaitu

Offline

Newbie Poster

Nov 23rd, 2009

i dont have curl installed in my php..Is there any way to do it without using curl.

http://drvirusindia.co.cc

•

Join Date: Feb 2010

Posts: 2

Reputation: Canaan_moore is an unknown quantity at this point

Solved Threads: 0

Canaan_moore Canaan_moore is offline

Offline

Newbie Poster

28 Days Ago

Hey guys. I have this tiny bit problem stuck here. See, I have finished my RSS feed, tested it and all works perfectly, but when I remove an article from my feed it still showed in the reader. How do i get the reader to see the article is no longer part of the feed. Any ideas what's wrong?
<url snipped>

Last edited by nav33n; 28 Days Ago at 7:18 am. Reason: Keep it on the site.

Thread Tools	Search this Thread
Show Printable Version Email this Page

DaniWeb Message

Cancel Changes