RSS Generator For Importing to Wordpress

 
function rss_maker_for_wordpress($items,
                                 $dates=.5,
                                 $back_date=1.0){
 
  /*
 
    Builds a (possibly invalid XML) RSS feed suitable for importing to
    wordpress.
 
    Author: Victory
    Release Date: 090815
    Version: 1.0
 
    For the description of the paramters see function rss_maker();
 
  */
 
  return rss_maker($items,
                   $dates,
                   $back_date,
                   "Wordpress Importable",
                   "http://example.net/",
                   "A WP Feed",
                   True,
                   False);
}

 
 
function rss_maker($items,
                   $dates=.5,
                   $back_date=0,
                   $title="The Feed", 
                   $link="http://example.com/",  
                   $description="A Feed",
                   $no_guid=False,
                   $escape_with_cdata=True){
 
  /*
    Builds a (possibly invalid XML) RSS feed.
 
    Author: Victory
    Release Date: 090815
    Version: 3.0
 
    @param array(array()) $items - The items to be inserted into the
    array. The inner array must set 'title','link' and 'description.'
 
    exmaple:
 
    $items=Array(Array("title"=>"Item 1",
                       "description"=>"Body of text for item 1"),
                 Array("title"=>"Second Item",
                       "description"=>"Body of text for item 2"));
 
    @param [array or float] $dates - If an array then its a list of
    Published Dates (PubDate) in date("r",mktime()) format, if its a
    float, create them randomly using choosen dates steped the number
    of days in the future.
 
    @param float $back_date - the number of days before today to start
    creating random dates (ignored if $dates is an array)
 
    @param string $title - string of the the title of the feed
    (ignored by wordpress)
 
    @param string $link - the feed's link (ignored by wordpress)
 
    @param string $description - the feed's description (ignored by
    wordpress)
 
    Basic Usage:
 
    $my_feed=
      rss_maker_for_wordpress(
       Array(
        Array("title"=>"Item 1",
              "description"=>"Body of text for item 1"),
        Array("title"=>"Second Item",
              "description"=>"Body of text for item 2")));
 
    NOTE: To get valid XML you would need to htmlentites() escape
    $items description.
 
  */
 
 
  /* start by setting the feeds channel info */
 
  // So if the dates are not set explicitly ...
  if(!is_array($dates)){
    // ... use a random time this morning as the pubdate,
    $pubDate = mktime(rand(0,5),rand(0,50),rand(0,50),
                      date("n"),date("j"),date("Y"));
  }else{// ... otherwise use the first date of $dates
    $pubDate = $dates[0];
  }
 
  // now get link, pubdate etc...
  $pubDate=date("r", $pubDate);
  $rss_link=$link;
  $rss_title=$title;
  $rss_description=$description;
  $rss_language="en-us";
 
  // and shove that into the feeds head.
  $feed[]="<" . "?xml version=\"1.0\"" . "?" . ">
<rss version=\"2.0\">
  <channel>
    <title><![CDATA[$rss_title]]></title>
    <link>$rss_link</link>
    <description><![CDATA[$rss_description]]></description>
    <language>$rss_language</language>
    <pubDate>$pubDate</pubDate>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
  ";
 
 
  // We can set up a template for a feed item. Note that if we wanted
  // to be more confident that this will create a valid feed than we
  // can use <![CDATA[%variable%]]> here instead, but wordpress and
  // others doen't always play nice with such feeds. Also you would
  // have to set a <guid>%link%#%guid%</guid> for this to be truly
  // valid and the items in $items would need a $item['link'];
 
  $rss_item="
    <item>
      <link>%link%</link>
  ";
  if($escape_with_cdata){
    $rss_item.="
      <title><![CDATA[%title%]]></title>
      <description><![CDATA[%description%]]></description>
  ";
  }else{
    $rss_item.="
      <title>%title%</title>
      <description>%description%</description>      
  ";
  }
  if(isset($items[0]['link'])){
    $rss_item .= "
      <guid>%link%#%guid%</guid>
  ";
  }
  $rss_item .="
      <pubDate>%pubdate%</pubDate>
    </item>
  ";
 
  // if dates aren't set then make dates randomly in the future
  if(!is_array($dates)){
 
    // the max time interval in minutes (1440 minutes in a day)
    $cur_day=-intval($back_date * 1440);
 
    $max_time_interval=max(1,intval($dates * 1440));
    $min_time_interval=intval(floor($max_time_interval/2.0));
 
    // switch date back an array
    $dates=Array();
 
    // create a random date for every item in the list
    for($i=0; $i<count($items); $i++){
 
      // step the cur_day forward
      $cur_day+=rand($min_time_interval,
                     $max_time_interval);
 
      $dates[]=
        mktime(rand(12,20),
               rand(0,55),
               rand(0,55),
               date("n",strtotime("+$cur_day minutes")),
               date("j",strtotime("+$cur_day minutes")),
               date("Y",strtotime("+$cur_day minutes")));
 
 
    }
    // "blog" order
    $dates=array_reverse($dates);
  }
 
  // We need to set up the variables array for the template
  $vars=Array("%title%","%link%","%description%",
              "%pubdate%","%guid%");
 
  // now just sub in the our values and append them to the feed
  foreach($items as $i=>$item){
    $pubDate=date("r", $dates[$i]);
    $vals=Array($item["title"],$item["link"],$item["description"],
                $pubDate,rand(10000,99999));
    $feed[]=str_replace($vars,$vals,$rss_item);
  }
 
  $feed[]="
  </channel>
</rss>
";
  return implode("\n",$feed);
}