Archive for July, 2009

Manage (Add, Edit, & Delete) cookies in jQuery

Posted by admin in JavaScript, jQuery on July 15th, 2009

Setting and deleting cookies with jQuery is really easy (especially in comparison to regular JavaScript) but this feature is not included in the jQuery core. For this we need a plug-in. This post shows how to set and get the value of cookies with jQuery.

First download the jQuery cookie plugin for here: http://plugins.jquery.com/project/Cookie

Set a cookie

Setting a cookie with jQuery is as simple as this, here we are creating a cookie called “example” with a value “demo”:

$.cookie("example", "demo");

This is a session cookie and will be destroy when user close his/her browser. To make the same cookie for suppose 7 days. We can do it like this:

$.cookie("example", "demo", { expires: 7 });

The above example will create the cookie at the root level. If you wanted to make it apply only to e.g. “/admin” and make it for 7 days you can do it like this:

$.cookie("example", "demo", { path: '/admin', expires: 7 });

Get the cookie’s value

Getting the cookie’s value is also very easy in jQuery. The following would alert the value of “example” cookie:

alert( $.cookie("example") );

Delete the cookie

And finally, to delete a cookie set its value to null.
Note:- Setting it to e.g. an empty string doesn’t remove it; it just clears the value.

$.cookie("example", null);

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Unscape HTML in JavaScript

Posted by admin in JavaScript on July 13th, 2009

This function strips tags and converts the entity forms of special HTML characters to their normal form. I created this function with the help of code of Prototype JavaScript library.

<script language="javascript">
function unscapeHTML(str) {
	var div = document.createElement('div');
    div.innerHTML = str.replace(/<\/?[^>]+>/gi, '');
 
	if (div.childNodes[0]) {
		if (div.childNodes.length > 1) {
			var retStr;
 
			for (var i = 0; i < div.childNodes.length; i++) {
				retStr += div.childNodes[i].nodeValue;
			}
 
			return retStr;
		}
		else {
			return div.childNodes[0].nodeValue;
		}
	}
	else {
		return '';
	}
}
</script>

How you can use it.

<script language="javascript">
var1 = 'x &gt; 10';
alert(unscapeHTML(var1));
// This will alert 'x > 10' 
 
var2 = '<h1>Pride &amp; Prejudice</h1>';
alert(unscapeHTML(var2));
// This will alert 'Pride & Prejudice'
</script>

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Convert XML to Array using DOM extension in PHP5

Posted by admin in PHP on July 4th, 2009

The xml2array class convert the XML stored in a string into an ARRAY. We are using the DOM extension of PHP5. The DOM extension replaced the DOM XML extension available in PHP4. The DOM XML extension is depreciated in PHP5.

<?php
class xml2array {
 
	function xml2array($xml) {
		if (is_string($xml)) {
			$this->dom = new DOMDocument;
			$this->dom->loadXml($xml);
		}
 
		return FALSE;
	}
 
	function _process($node) { 
		$occurance = array();
 
		foreach($node->childNodes as $child) {
			$occurance[$child->nodeName]++;
		}
 
		if($node->nodeType == XML_TEXT_NODE) { 
			$result = html_entity_decode(htmlentities($node->nodeValue, ENT_COMPAT, 'UTF-8'), 
                                     ENT_COMPAT,'ISO-8859-15');
		} 
		else {
			if($node->hasChildNodes()){
				$children = $node->childNodes;
 
				for($i=0; $i<$children->length; $i++) {
					$child = $children->item($i);
 
					if($child->nodeName != '#text') {
						if($occurance[$child->nodeName] > 1) {
							$result[$child->nodeName][] = $this->_process($child);
						}
						else {
							$result[$child->nodeName] = $this->_process($child);
						}
					}
					else if ($child->nodeName == '#text') {
						$text = $this->_process($child);
 
						if (trim($text) != '') {
							$result[$child->nodeName] = $this->_process($child);
						}
					}
				}
			} 
 
			if($node->hasAttributes()) { 
				$attributes = $node->attributes;
 
				if(!is_null($attributes)) {
					foreach ($attributes as $key => $attr) {
						$result["@".$attr->name] = $attr->value;
					}
				}
			}
		}
 
		return $result;
	}
 
	function getResult() {
		return $this->_process($this->dom);
	}
}
?>

We can use this class like this.

<?php
	$obj = new xml2array($XML_string);
	$XML_array = $obj->getResult();
?>

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4 Comments