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RSS Writer Class

Published in: PHP 


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Contains two classes. RSS and RSSItem. Create a new RSS object and then populate it with RSSItems. Supports enclosures (audio/video files).

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  1. /* E X A M P L E -----------------------------------------------
  2. 		$feed = new RSS();
  3. 		$feed->title       = "RSS Feed Title";
  4. 		$feed->link        = "http://website.com";
  5. 		$feed->description = "Recent articles on your website.";
  6.  
  7. 		$db->query($query);
  8. 		$result = $db->result;
  9. 		while($row = mysql_fetch_array($result, MYSQL_ASSOC))
  10. 		{
  11. 			$item = new RSSItem();
  12. 			$item->title = $title;
  13. 			$item->link  = $link;
  14. 			$item->setPubDate($create_date); 
  15. 			$item->description = "<![CDATA[ $html ]]>";
  16. 			$feed->addItem($item);
  17. 		}
  18. 		echo $feed->serve();
  19. 	---------------------------------------------------------------- */
  20.  
  21. 	class RSS
  22. 	{
  23. 		var $title;
  24. 		var $link;
  25. 		var $description;
  26. 		var $language = "en-us";
  27. 		var $pubDate;
  28. 		var $items;
  29. 		var $tags;
  30.  
  31. 		function RSS()
  32. 		{
  33. 			$this->items = array();
  34. 			$this->tags  = array();
  35. 		}
  36.  
  37. 		function addItem($item)
  38. 		{
  39. 			$this->items[] = $item;
  40. 		}
  41.  
  42. 		function setPubDate($when)
  43. 		{
  44. 			if(strtotime($when) == false)
  45. 				$this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
  46. 			else
  47. 				$this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
  48. 		}
  49.  
  50. 		function getPubDate()
  51. 		{
  52.   			if(empty($this->pubDate))
  53. 				return date("D, d M Y H:i:s ") . "GMT";
  54. 			else
  55. 				return $this->pubDate;
  56. 		}
  57.  
  58. 		function addTag($tag, $value)
  59. 		{
  60. 			$this->tags[$tag] = $value;
  61. 		}
  62.  
  63. 		function out()
  64. 		{
  65. 			$out  = $this->header();
  66. 			$out .= "<channel>\n";
  67. 			$out .= "<title>" . $this->title . "</title>\n";
  68. 			$out .= "<link>" . $this->link . "</link>\n";
  69. 			$out .= "<description>" . $this->description . "</description>\n";
  70. 			$out .= "<language>" . $this->language . "</language>\n";
  71. 			$out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
  72.  
  73. 			foreach($this->tags as $key => $val) $out .= "<$key>$val</$key>\n";
  74. 			foreach($this->items as $item) $out .= $item->out();
  75.  
  76. 			$out .= "</channel>\n";
  77.  
  78. 			$out .= $this->footer();
  79.  
  80. 			$out = str_replace("&", "&amp;", $out);
  81.  
  82. 			return $out;
  83. 		}
  84.  
  85. 		function serve($contentType = "application/xml")
  86. 		{
  87. 			$xml = $this->out();
  88. 			header("Content-type: $contentType");
  89. 			echo $xml;
  90. 		}
  91.  
  92. 		function header()
  93. 		{
  94. 			$out  = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
  95. 			$out .= '<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">' . "\n";
  96. 			return $out;
  97. 		}
  98.  
  99. 		function footer()
  100. 		{
  101. 			return '</rss>';
  102. 		}
  103. 	}
  104.  
  105. 	class RSSItem
  106. 	{
  107. 		var $title;
  108. 		var $link;
  109. 		var $description;
  110. 		var $pubDate;
  111. 		var $guid;
  112. 		var $tags;
  113. 		var $attachment;
  114. 		var $length;
  115. 		var $mimetype;
  116.  
  117. 		function RSSItem()
  118. 		{ 
  119. 			$this->tags = array();
  120. 		}
  121.  
  122. 		function setPubDate($when)
  123. 		{
  124. 			if(strtotime($when) == false)
  125. 				$this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
  126. 			else
  127. 				$this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
  128. 		}
  129.  
  130. 		function getPubDate()
  131. 		{
  132. 			if(empty($this->pubDate))
  133. 				return date("D, d M Y H:i:s ") . "GMT";
  134. 			else
  135. 				return $this->pubDate;
  136. 		}
  137.  
  138. 		function addTag($tag, $value)
  139. 		{
  140. 			$this->tags[$tag] = $value;
  141. 		}
  142.  
  143. 		function out()
  144. 		{
  145. 			$out .= "<item>\n";
  146. 			$out .= "<title>" . $this->title . "</title>\n";
  147. 			$out .= "<link>" . $this->link . "</link>\n";
  148. 			$out .= "<description>" . $this->description . "</description>\n";
  149. 			$out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
  150.  
  151. 			if($this->attachment != "")
  152. 				$out .= "<enclosure url='{$this->attachment}' length='{$this->length}' type='{$this->mimetype}' />";
  153.  
  154. 			if(empty($this->guid)) $this->guid = $this->link;
  155. 			$out .= "<guid>" . $this->guid . "</guid>\n";
  156.  
  157. 			foreach($this->tags as $key => $val) $out .= "<$key>$val</$key\n>";
  158. 			$out .= "</item>\n";
  159. 			return $out;
  160. 		}
  161.  
  162. 		function enclosure($url, $mimetype, $length)
  163. 		{
  164. 			$this->attachment = $url;
  165. 			$this->mimetype   = $mimetype;
  166. 			$this->length     = $length;
  167. 		}
  168. 	}

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Comments

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Posted By: lkrubner on September 30, 2007

In this line:

foreach($this->tags as $key => $val) $out .= "$val";

Is the newline really suppose to be inside of the tag?

Posted By: nijgnet on March 3, 2008

ln145: $out .= "\n"; should be not be a concatenation. Change to $out = "\n";

Posted By: zenoseo on November 13, 2009

Tried in145: $out .= "\n"; should be not be a concatenation. Change to $out = "\n but still not working

Posted By: Whowonthesuperbowl on February 1, 2010

Very nice, thanks for drawing this out for us. It's even cooler that it supports video, which is pretty much a must-have these days!

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