PHP Examples

You must have noticed that IE will show the cached response for the ajax calls. To prevent this, just add these lines before outputting any content as response: <?php header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header("Cache-Control: no-store, no-cache, must-revalidate"); header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); ?>

Joomla uses mootools by default. If you want to use another javascript library like jquery in your site.... 1. You can use a plugin like SC Jquery and then either add code in the admin panel like: $("#contactus_reset").click(function() { $("[rel=error_label]").css("display","none"); }); or write the code inside your template index.php file, under head tag, like: <script type="text/javascript"> $(function() {     $(".anyClass").jCarouselLite({         btnNext: ".next",         btnPrev: ".prev"     }); }); </script> And better add these lines inside your template index.php file, under head tag to avoid jquery conflicts. <?php $document = &JFactory::getDocument(); $document->addScriptDeclaration ( 'jQuery.noConflict();' ); ?> 2. There is another way to enable jquery support in your site. Here are the steps i did to enable jquery support in my site:

An example to write javascript code in php, escaping quotes: Suppose this is your requirement. You have to display an image, which has an onclick event, to some function that must accept dynamic php parameters. This is the static code: <img width="210" border="0" onclick="javascript:load_user('qrp3p0s42ebcsf','local','downloads/882381283.pdf',0);" style="cursor:pointer;" src="images/stories/watch-now.png"> So first what we do is, prepare the javascript onclick part dynamically in php: $img_js = ' onclick="javascript:load_user(\''.$user['id'].'\',\''.$user['access'].'\',\''.$file_path.'\',0);" '; Then add that to the image code. Now this is the final code we write entirely in php: $user_img is the dynamic image url. <?php echo '<img width="210" border="0" style="cursor:pointer;&

Did you ever create a custom component in joomla, that has a functionality of admin uploading a file?  Reference There are 3 things that you need to be aware of: First is under your form attribute, please make sure that you have enctype="multipart/form-data". Second thing is when you grab the file at server site, please make sure the name is same as what you named on your HTML. In this case is, $file = JRequest::getVar( 'image', '', 'files', 'array'); Then make sure you include the necessarylibraries in your admin model file: jimport('joomla.filesystem.file'); jimport('joomla.filesystem.folder'); Form code: <form action="index.php" method="post" name="adminForm" id="adminForm" enctype="multipart/form-data">   <input class="inputbox" name="image" type="file" id="upload_file" /> </form> PHP code in your comp

The following code resizes a png image and displays it as a jpg image: <?php     header("content-type: image/jpg");     $file_name = 'img.png';         $srcsize = getimagesize($file_name);         $ext = strrchr($file_name,'.');     $ext = strtolower($ext);               if($ext == ".jpg"){                $new_img_big = imagecreatefromjpeg($file_name);     }elseif($ext == ".png"){                $new_img_big = imagecreatefrompng($file_name);     }elseif($ext == ".gif"){                $new_img_big = imagecreatefromgif($file_name);     }         $resized_img_big = imagecreatetruecolor(100, 100);     imagecopyresized($resized_img_big, $new_img_big, 0, 0, 0, 0, 100, 100, $srcsize[0], $srcsize[1]);              imagejpeg($resized_img_big);                  /*imagedestroy($src_img);     imagedestroy($dst_img);*/ ?>

This javascript function hides all the labels in the document, that have a rel attribute: <script type="text/javascript"> function hide_labels() {        var arr = document.getElementsByTagName("label");     var arr2 = [];             for (i = 0; i < arr.length; i++) {     if(arr[i].hasAttribute("rel"))     arr2.push(arr[i]);         }     //console.log(arr2);         for (i = 0; i < arr2.length; i++) {     arr2[i].setAttribute('style', 'display:none;');     } } </script>