php Script to fetch RSS info

/**
* Class name: RSS
* Author : LeadStar Team
* website : http://www.leadstar.com.cn/
* CopyRight : LeadStar Team
*/
if (defined('_CLASS_RSS_PHP')) return;
define('_CLASS_RSS_PHP',1);

class RSS {
//public
var $rss_ver = "2.0";
var $channel_title = '';
var $channel_link = '';
var $channel_description = '';
var $language = 'zh_CN';
var $copyright = '';
var $webMaster = '';
var $pubDate = '';
var $lastBuildDate = '';
var $generator = 'RedFox RSS Generator';

var $content = '';
var $items = array();

/**************************************************************************/
// function name: RSS
// function description: construct
// parameter: $title
// $link
// $description
/**************************************************************************/
function RSS($title, $link, $description) {
$this->channel_title = $title;
$this->channel_link = $link;
$this->channel_description = $description;
$this->pubDate = Date('Y-m-d H:i:s',time());
$this->lastBuildDate = Date('Y-m-d H:i:s',time());
}
/**************************************************************************/
// function name: AddItem
// function description: add a new node
// parameter: $title
// $link
// $description $pubDate
/**************************************************************************/
function AddItem($title, $link, $description ,$pubDate) {
$this->items[] = array('title' => $title ,
'link' => $link,
'description' => $description,
'pubDate' => $pubDate);
}
/**************************************************************************/
// function name: BuildRSS
// function description: generate rss xml file content
/**************************************************************************/
function BuildRSS() {
$s = "
\n\n";
// start channel
$s .= "\n";
$s .= "channel_title}]]>\n";
$s .= "<1ink>channel_link}]]>\n";
$s .= "channel_description}]]>\n";
$s .= "{$this->language}\n";
if (!empty($this->copyright)) {
$s .= "copyright}]]>\n";
}
if (!empty($this->webMaster)) {
$s .= "webMaster}]]>\n";
}
if (!empty($this->pubDate)) {
$s .= "{$this->pubDate}\n";
}

if (!empty($this->lastBuildDate)) {
$s .= "{$this->lastBuildDate}\n";
}

if (!empty($this->generator)) {
$s .= "{$this->generator}\n";
}

// start items
for ($i=0;$iitems);$i++) {
$s .= "\n";
$s .= "items[$i]['title']}]]>\n";
$s .= "<1ink>items[$i]['link']}]]>\n";
$s .= "items[$i]['description']}]]>\n";
$s .= "{$this->items[$i]['pubDate']}\n";
$s .= "\n";
}

// close channel
$s .= "\n";
$this->content = $s;
}
/**************************************************************************/
// function name: Show
// function description: print out the RSS xml file content
/**************************************************************************/
function Show() {
if (empty($this->content)) $this->BuildRSS();
echo($this->content);
}
/**************************************************************************/
// function name: SaveToFile
// function description: save the RSS content to a file
// parameter: $fname the file name to be saved
/**************************************************************************/
function SaveToFile($fname) {
$handle = fopen($fname, 'wb');
if ($handle === false) return false;
fwrite($handle, $this->content);
fclose($handle);
}
}

Ajaxian.com 2006 Survey Results

Ajaxian.com 2006 Survey Results

The results of our second annual Ajaxian.com survey, prepared by Richard Monson-Hafael from the Burton Group, are in. And the winner is… Prototype, the most popular Ajax framework, by a considerable margin: 43% of you use it. Script.aculo.us is next, at 33%, confirming observations that many of made of the popularity of that duo.

The full results of our framework survey follow:

Note that multiple responses per participant were allowed; we’ve also thrown out any result with less than 3% of responses in the above graphic.

We also asked you about the server-side platform you’re using. The big winner here was PHP, with 50% of you using it:

Some other interesting factoids:

• 25% of you eschew frameworks and work with XMLHttpRequest directly (wow!)
• 11% of you are using JSON to transfer data; unfortunately, we didn’t ask enough questions to determine how this compares with XML or other data formats
• 3% of you are still using Microsoft’s “classic” ASP framework; five of you (~0.6%) are using C++ (+2 points for increased performance, -100 for increased complexity?)
• 2% of you wrote in to say that you’re using Adobe’s Flex toolkit (hey, those banner ads are working out…); 2% also indicated that they use the Flex/Ajax bridge. Unfortunately, the survey software we used doesn’t let us correlate these entries, so we can only say that 2%-4% of you are using Flex in some way
• One participant uses Delphi (how’s that working out for you?), and another is using LISP (can we hire you?).

getElementsByClassName My Eesy Edition

Take it easy

function getElementsByClassName(className, tag){
var testClass = new RegExp("(^|\\s)" + className + "(\\s|$)");
var tag = tag || "*";

var elements = (tag == "*" && document.all)? document.all : document.getElementsByTagName(tag);
var returnElements = [];
var current;
var length = elements.length;
for(var i=0; i
current = elements[i];
if(testClass.test(current.className)){
returnElements.push(current);
}
}
return returnElements;
}

getElementsByClassName Delux Edition

GET it FROM http://muffinresearch.co.uk/archives/2006/04/29/getelementsbyclassname-deluxe-edition/

function getElementsByClassName(strClass, strTag, objContElm) {
 strTag = strTag || "*";
 objContElm = objContElm || document;
 var objColl = objContElm.getElementsByTagName(strTag);
 if (!objColl.length &&  strTag == "*" &&  objContElm.all) objColl = objContElm.all;
 var arr = new Array();
 var delim = strClass.indexOf('|') != -1  ? '|' : ' ';
 var arrClass = strClass.split(delim);
 for (var i = 0, j = objColl.length; i < j; i++) {
   var arrObjClass = objColl[i].className.split(' ');
   if (delim == ' ' && arrClass.length > arrObjClass.length) continue;
   var c = 0;
   comparisonLoop:
   for (var k = 0, l = arrObjClass.length; k < l; k++) {
     for (var m = 0, n = arrClass.length; m < n; m++) {
       if (arrClass[m] == arrObjClass[k]) c++;
       if (( delim == '|' && c == 1) || (delim == ' ' && c == arrClass.length)) {
         arr.push(objColl[i]);
         break comparisonLoop;
       }
     }
   }
 }
 return arr;
}

Javascript for updating one windows from another

window.onload = initWindows;

function initWindows() {
if (document.getElementById("childField")) {
document.getElementById("childField").onchange = updateParent;
}
else {
newWindow = window.open("child.html","newWin","status=yes,width=300,height=300");
}
}

function updateParent() {
opener.document.getElementById("msgLine").value = "Hello " + this.value + "!";
}

PHP DataTable Displaying and Paging

I have made a function to fetch data from database and show it in a HTML table. It's easy to use but hard to read. HTML text has been linked together.

function getResultAsTable ($actions, $result)
{
     if ($rowcount =pg_num_rows($result)>0)
     {
         $resultHTML= "<table border="'1'" align="'center'">\n<tr bgcolor="'#e8eefa'">\n";
        
         //Output the table header
         $fieldCount = pg_num_fields($result);
         for ($i=0; $i < $fieldCount; $i++)
         {
             $rowName = pg_field_name($result,$i);
             $resultHTML .= "<th valign="'middle'">$rowName</th>\n";
         }
        
        $resultHTML .= "<th>Actions</th></tr>\n";
    
        //output the table body
           while ($row = pg_fetch_row($result))
        {
             $resultHTML .="\n";
             for ($i=0; $i < $fieldCount; $i++)
             {
                $resultHTML .="<td>".htmlentities($row[$i])."</td>\n";
             }
            
               //Replace VALUE with proper primary key
             $action = str_replace("VALUE", $row[0], $actions);
             //Add action cell to the end of each row
             $resultHTML .= "<td>$action</td>\n</tr>\n";
            
         }
        
         //Close table
         $resultHTML .="</table>\n";
     }
     else
     {
         $resultHTML = "No Result Found";
     }
     return  $resultHTML;
}


function pageLinks($totalpages, $currentpage, $pagesize, $parameter)
{
// Start at page one
$page = 1;
// Start at record 0
$recordstart = 0;

// Initialize page links
$pageLinks = '';
while ($page <= $totalpages) {     
// Link the page if it isn't the current one     
 if ($page != $currentpage) {
   $pageLinks .= "<a href="http://www.blogger.com/%5C" 
  parameter="$recordstart\">$page</a> ";
      // If the current page, just list the number
  }
  else {
      $pageLinks .= "$page ";
  }
  // Move to the next record delimiter
  $recordstart += $pagesize;
  $page++;
}

return $pageLinks;
}

Design Pattern in PHP Architecture

Singleton pattern defines a class that hs only a single global instance. There are an abundance of places where a singleton is a natural choice. A browsing user has only a single set of cookies and has only one profile. Similarly, a class that wraps an HTTP request has only one instance per request. If you use a database driver that does not share connections, you might want to use a singleton to ensure that only a single connection is every open to a given database at a given time.

One successful method for implementing singletons in PHP5 is to use a factory method to create a singleton. The factory method keeps a private reference to the original instance of the class and returns that on request.

class Singleton {
private static $instance = false;
public $property;

private function __construct () {}
public static function genInstance ()
{
if (self :: $instance === false) {
self :: $instance=new Singleton;
}
return self :: $instance;
}
}

$a = Singleton :: getInstance()
$b = Singleton :: getInstance()
$a ->property = "Hello world";

print $b ->property;

//Amazing! The result will be "Hello world"//

In fact, if set the constructor methods private, you can only make instance inside the class, if you try to instantiate outside the class, you will get a fatal error.