RSS Feed Script Parser Help

Hello,

Im currently using this script http://www.sitepoint.com/examples/phpxml/sitepointcover.php.txt to display RSS feed on my website.

The script works properly as seen here as an example:
http://www.grabimage.com/feed.php

What I want to do though is limit the amount of news items being displayed on the page. On the feed above there is 9 news items, lets say I want to limit that to 5 items... Can I edit the script above so it will only display 5 items instead of all the items on a particular feed? If so can anyone please show me how to do this...

Sorry if I do not make sense... Any help will be greatly appreciated.

Thanks

 

php5 I hope :

<?
class rss
{
		public static   $url,
						$limit,
						$encoding,
						$struct,
						$parser,
						$raw,
						$links,
						$descs ;
	
	function __construct( $url, 
						  $limit = 5, 
						  $encoding = null, 
						  $links = "<dt><b><a href='%s'>%s</a></b></dt>", 
						  $descs = "<dd>%s</dd>" )
	{
		self::$limit = $limit ;
		self::$encoding = trim( $encoding ) ;
		self::$url = trim( $url ) ;
		self::$links = $links;
		self::$descs = $descs;
			
		if( !( self::$parser = xml_parser_create( self::$encoding ) ) ) :
			print("xml::error : Cannot create parser");
		elseif( !xml_set_object( self::$parser, $this ) ) :
			print("xml:error : Cannot set object for parser");
		elseif( !xml_set_element_handler( self::$parser, array( "self", "xmlStart"), array( "self", "xmlEnd")) ):
			print("xml::error : Cannot set element handler");
		elseif( !xml_set_character_data_handler( self::$parser, array( "self", "xmlChard") ) ):
			print("xml::error : Cannot set data handler");
		elseif( !(self::$raw = file_get_contents( self::$url ) ) ) :
			print("xml::error : Cannot retrieve rss from " . self::$url );
		elseif( !xml_parse( self::$parser, self::$raw )) :
			self::getError( );
		endif;
		
		@xml_parser_free( self::$parser );
	}
	function xmlStart( $parser, $name, $attrs )
	{
		if ( self::$struct['insideitem'] ): self::$struct['tag'] = $name;
		elseif( $name == "ITEM" ): self::$struct['insideitem'] = true;
		endif;
	}
	function xmlEnd( $parser, $name )
	{
		if( !self::$limit ) return;
		
		if( $name == "ITEM" ):
			printf( self::$links, trim( self::$struct['link'] ), htmlspecialchars(trim( self::$struct['title'] )));
			printf( self::$descs, htmlspecialchars( trim( self::$struct['description'] ) ));
			self::$limit--;
		endif;
	}
	function xmlChard( $parser, $data )
	{
		if( self::$struct['insideitem'] ) :
			switch( self::$struct['tag'] ) :
				case "TITLE" : self::$struct['title'] .= $data ; break;
				case "DESCRIPTION" : self::$struct['description'] .= $data; break;
				case "LINK" : self::$struct['link'] .= $data ; break;
			endswitch;
		endif;	
	}
	function getError( )
	{
		printf("xml::error : %s at line %d", xml_error_string(xml_get_error_code( self::$parser ) ), 
											 xml_get_current_line_number( self::$parser )
			  );
	}
}
?>

PHP:

save that file as something.php, then where you want the content displayed on the page use the following code to get it there.

<? include("something.php"); new rss("http://www.sitepoint.com/rss.php"); ?>

PHP:

prototype :
void new rss( string url, [ int limit, [ string encoding, [ string links, [ string descs ] ] ] ] );

defaults :
limit = 5
encoding = null
links = "<dt><b><a href='%s'>%s</a></b></dt>"
descs = "<dd>%s</dd>"

that was fun thanks .....

 

Thank you very much for your help.

However im not on PHP5, my PHP version is 4.4.2 and when I tried to run the script I got the error below...

Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /home/x/public_html/include/rssfeed.php on line 4

Code (markup):

Can you edit the script so it will work on my PHP version or maybe I just did something wrong?

Green rep added!

 

<?
class rss
{
		var   			$url,
						$limit,
						$encoding,
						$struct,
						$parser,
						$raw,
						$links,
						$descs ;
	
	function rss( $url, 
						  $limit = 5, 
						  $encoding = null, 
						  $links = "<dt><b><a href='%s'>%s</a></b></dt>", 
						  $descs = "<dd>%s</dd>" )
	{
		$this->limit = $limit ;
		$this->encoding = trim( $encoding ) ;
		$this->url = trim( $url ) ;
		$this->links = $links;
		$this->descs = $descs;
			
		if( !( $this->parser = xml_parser_create( $this->encoding ) ) ) :
			print("xml::error : Cannot create parser");
		elseif( !xml_set_object( $this->parser, $this ) ) :
			print("xml:error : Cannot set object for parser");
		elseif( !xml_set_element_handler( $this->parser, array( $this, "xmlStart"), array( $this, "xmlEnd")) ):
			print("xml::error : Cannot set element handler");
		elseif( !xml_set_character_data_handler( $this->parser, array( "self", "xmlChard") ) ):
			print("xml::error : Cannot set data handler");
		elseif( !($this->raw = file_get_contents( $this->url ) ) ) :
			print("xml::error : Cannot retrieve rss from " . $this->url );
		elseif( !xml_parse( $this->parser, $this->raw )) :
			$this->getError( );
		endif;
		
		xml_parser_free( $this->parser );
	}
	function xmlStart( $parser, $name, $attrs )
	{
		if ( $this->struct['insideitem'] ): $this->struct['tag'] = $name;
		elseif( $name == "ITEM" ): $this->struct['insideitem'] = true;
		endif;
	}
	function xmlEnd( $parser, $name )
	{
		if( !$this->limit ) return;
		
		if( $name == "ITEM" ):
			printf( $this->links, trim( $this->struct['link'] ), htmlspecialchars(trim( $this->struct['title'] )));
			printf( $this->descs, htmlspecialchars( trim( $this->struct['description'] ) ));
			$this->limit--;
		endif;
	}
	function xmlChard( $parser, $data )
	{
		if( $this->struct['insideitem'] ) :
			switch( $this->struct['tag'] ) :
				case "TITLE" : $this->struct['title'] .= $data ; break;
				case "DESCRIPTION" : $this->struct['description'] .= $data; break;
				case "LINK" : $this->struct['link'] .= $data ; break;
			endswitch;
		endif;	
	}
	function getError( )
	{
		printf("xml::error : %s at line %d", xml_error_string(xml_get_error_code( $this->parser ) ), 
											 xml_get_current_line_number( $this->parser )
			  );
	}
}
//void new rss( string url, [ int limit, [ string encoding, [ string links, [ string descs ] ] ] ] );
new rss( "http://www.sitepoint.com/rss.php" );

PHP:

Try that first, dunno if php is going to handle the object properly.

 

Here is what I would use:
http://magpierss.sourceforge.net/

 

@krakjoe

Thanks for the follow up..

I saved the code above (rssfeed.php) and then use PHP include to display the feed <php include("include/rssfeed.php"); ?> and now im getting the error below..

Warning: xml_parse(): Unable to call handler in /home/x/public_html/include/rssfeed.php on line 35

Code (markup):

Any idea?

@hamidof
That script looks a bit complex to me, the one I currently have gets the job done.. it's just I wanted to limit the amount feed being displayed.. I will try it out..

 

<?
class rss
{
		var   			$url,
						$limit,
						$encoding,
						$struct,
						$parser,
						$raw,
						$links,
						$descs ;
	
	function __construct( $url, 
						  $limit = 5, 
						  $encoding = null, 
						  $links = "<dt><b><a href='%s'>%s</a></b></dt>", 
						  $descs = "<dd>%s</dd>" )
	{
		$this->limit = $limit ;
		$this->encoding = trim( $encoding ) ;
		$this->url = trim( $url ) ;
		$this->links = $links;
		$this->descs = $descs;
			
		if( !( $this->parser = xml_parser_create( $this->encoding ) ) ) :
			print("xml::error : Cannot create parser");
		elseif( !xml_set_object( $this->parser, $this ) ) :
			print("xml:error : Cannot set object for parser");
		elseif( !xml_set_element_handler( $this->parser, "xmlStart",  "xmlEnd" ) ):
			print("xml::error : Cannot set element handler");
		elseif( !xml_set_character_data_handler( $this->parser, "xmlChard" ) ):
			print("xml::error : Cannot set data handler");
		elseif( !($this->raw = file_get_contents( $this->url ) ) ) :
			print("xml::error : Cannot retrieve rss from " . $this->url );
		elseif( !xml_parse( $this->parser, $this->raw )) :
			$this->getError( );
		endif;
		
		xml_parser_free( $this->parser );
	}
	function xmlStart( $parser, $name, $attrs )
	{
		if ( $this->struct['insideitem'] ): $this->struct['tag'] = $name;
		elseif( $name == "ITEM" ): $this->struct['insideitem'] = true;
		endif;
	}
	function xmlEnd( $parser, $name )
	{
		if( !$this->limit ) return;
		
		if( $name == "ITEM" ):
			printf( $this->links, trim( $this->struct['link'] ), htmlspecialchars(trim( $this->struct['title'] )));
			printf( $this->descs, htmlspecialchars( trim( $this->struct['description'] ) ));
			$this->limit--;
		endif;
	}
	function xmlChard( $parser, $data )
	{
		if( $this->struct['insideitem'] ) :
			switch( $this->struct['tag'] ) :
				case "TITLE" : $this->struct['title'] .= $data ; break;
				case "DESCRIPTION" : $this->struct['description'] .= $data; break;
				case "LINK" : $this->struct['link'] .= $data ; break;
			endswitch;
		endif;	
	}
	function getError( )
	{
		printf("xml::error : %s at line %d", xml_error_string(xml_get_error_code( $this->parser ) ), 
											 xml_get_current_line_number( $this->parser )
			  );
	}
}
//void new rss( string url, [ int limit, [ string encoding, [ string links, [ string descs ] ] ] ] );
new rss( "http://www.sitepoint.com/rss.php" );

PHP:

try that....

 

Hey if that doesn't work either, use the rss.php file from http://www.simpcms.com/light.html
THat is the one I use

 

my apologies I could / should have done this first instead of messing about :

<html>
<head>
<title> Current SitePoint Articles </title>
</head>
<body>
<h2>Currently on SitePoint.com...</h2>
<dl>
<?php

$insideitem = false;
$tag = "";
$title = "";
$description = "";
$link = "";
$limit = 5;

function startElement($parser, $name, $attrs) {
	global $insideitem, $tag, $title, $description, $link;
	if ($insideitem) {
		$tag = $name;
	} elseif ($name == "ITEM") {
		$insideitem = true;
	}
}

function endElement($parser, $name) {
	global $insideitem, $tag, $title, $description, $link, $limit ;
	if( !$limit ) return;
	if ($name == "ITEM") {
		printf("<dt><b><a href='%s'>%s</a></b></dt>",
			trim($link),htmlspecialchars(trim($title)));
		printf("<dd>%s</dd>",htmlspecialchars(trim($description)));
		$title = "";
		$description = "";
		$link = "";
		$insideitem = false;
		$limit--;
	}
}

function characterData($parser, $data) {
	global $insideitem, $tag, $title, $description, $link;
	if ($insideitem) {
	switch ($tag) {
		case "TITLE":
		$title .= $data;
		break;
		case "DESCRIPTION":
		$description .= $data;
		break;
		case "LINK":
		$link .= $data;
		break;
	}
	}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
$fp = fopen("http://www.sitepoint.com/rss.php","r")
	or die("Error reading RSS data.");
while ($data = fread($fp, 4096))
	xml_parse($xml_parser, $data, feof($fp))
		or die(sprintf("XML error: %s at line %d", 
			xml_error_string(xml_get_error_code($xml_parser)), 
			xml_get_current_line_number($xml_parser)));
fclose($fp);
xml_parser_free($xml_parser);

?>
</dl>
</body>
</html>

PHP:

 

krakjoe the last code you provided works perfectly!

Thanks you very much for your help!