Skip to main content

PHP Dynamic Image generation script - create fast loading image gallaries

PHP Dynamic Image generation script

A simple script in PHP which generates less sized image on runtime. the script needs PHP GD library installed on the server.



  • This will save the page loading time
  • A large image with huge sized image can be scaled and MB size of image can be reduced
  • Script can generate image in Large,medium,small and custom size
  • This can be used to create simple PHP image gallaries
  • Image name should be passed as base64 encoded



The below given script must be saved as image.php

<?php
ob_start();

function createImage( $upload, $newWidth =120)
{
if (!$info = getimagesize($upload) )
return false;

$aspect = $info[0] / $info[1];
$newHeight = round( $newWidth/$aspect );

//get image type
$mimetype=$info['2'];

//create image based on type
if( $mimetype == 2 )
$src = @imagecreatefromjpeg("$upload");
elseif( $mimetype == 1 )
$src = @imagecreatefromgif("$upload");
elseif( $mimetype == 3 )
$src = @imagecreatefrompng("$upload");

if ( !$src )
return false;
//die( "$newWidth $newHeight");
$tmp = @imagecreatetruecolor( $newWidth, $newHeight );
imagecopyresampled( $tmp, $src, 0, 0, 0, 0, $newWidth,
$newHeight, $info[0], $info[1] );
ob_end_flush();

//rendering image

header("Content-type: {$mimetype}");
if( $mimetype == 2 )
imagejpeg( $tmp );
elseif( $mimetype == 1 )
imagegif( $tmp );
elseif( $mimetype == 3 )
imagepng( $tmp );

imagedestroy( $src );
imagedestroy( $tmp );
return true;
}
// Function end


if( isset($_GET["imgsrc"]) && trim($_GET["imgsrc"]) != "" ){
$thumbnail_width=120; $thumbnailFlag=0;
$img_file=base64_decode(trim($_GET["imgsrc"]));

$resizedwidth=120;

$sourceFolder="images/";




if( is_file( $sourceFolder.$img_file ) ){

if( isset($_GET['size']) && strtolower( trim( $_GET['size'] )) == "large" ){
$resizedwidth=620;
}elseif( isset($_GET['size']) && strtolower( trim( $_GET['size'] )) == "medium" ){
$resizedwidth=400;
}elseif( isset($_GET['size']) && strtolower( trim( $_GET['size'] )) == "custom" && isset($_GET['wid']) && intval( $_GET['wid'] ) > $thumbnail_width ){
$resizedwidth=intval( $_GET['wid'] );
}else{
$thumbnailFlag=1;
$resizedwidth=$thumbnail_width;
}

$imgInfo=getimagesize($sourceFolder.$img_file);
if( intval( $imgInfo[0] ) < $resizedwidth && !$thumbnailFlag ){
$resizedwidth = intval( $imgInfo[0] );
}

createImage( $sourceFolder.$img_file , $resizedwidth);
}
}



?>

Save the above script as image.php




The script assumes, that all images are in "images" folder in root, You can modify it according to your needs.

To generate the images you should use like given below:

<img src="http://www.your_domain.com/image.php?imgsrc=<?php echo(base64_encode('myimage.jpg')) ?>&size=small" />

<img src="http://www.your_domain.com/image.php?imgsrc=<?php echo(base64_encode('myimage.jpg')) ?>&size=large" />

<img src="http://www.your_domain.com/image.php?imgsrc=<?php echo(base64_encode('myimage.jpg')) ?>&size=medium" />

<img src="http://www.your_domain.com/image.php?imgsrc=<?php echo(base64_encode('myimage.jpg')) ?>&size=custom&width=200" />


The image link looks some what like this:
http://www.YOUR_DOMAIN.com/image.php?imgsrc=SU1HXzQyMDVfMTM2MTY0OTQyMS5KUEc=&size=small

<img src="http://www.YOUR_DOMAIN.com/image.php?imgsrc=SU1HXzQyMDVfMTM2MTY0OTQyMS5KUEc=&size=small" />

Try this and post your comments :)

PHP GD library: http://www.php.net/manual/en/book.image.php

Popular posts from this blog

How to apply for a new ration card and what are the documents required?

List of documents required for new ration card application in Kerala and how to apply


Application for a new ration card should be addressed to Taluk Supply Officer (TSO) / City Rationing Officer (CRO) of applicant's residing area.

Primary document required are Residence certificate, Income certificate and incase the applicant's name is in another ration card then he/she should submit the reduction certificate ontained from previous TSO / CRO as proof for removing his/her name from old Ration card.

You can get the new application from your currently residing Taluk Supply Office.

Payback Points - How to redeem - How to merge multiple payback accounts - Block Payback card - Payback customer care

Joomla and Forum Integration - Integrating Forums to Joomla

Joomla is one of the most popular CMS opensource packages. It is very easier to develop website's using Joomla. You just need to download Joomla package from Joomla's Official website www.joomla.org  and install it on your domain and later adding customizations to templates and feature and Your website is ready :). Now a days most websites provides a forum section for it users for discussing various article topics, gathering opinions etc.



Following are some best know forum opensource packages which can be integrated with Joomla and create a new forum experience for users


Urgent Openings for PHP trainees, Andriod / IOS developers and PHP developers in Kochi Trivandrum Calicut and Bangalore. Please Send Your updated resumes to recruit.vo@gmail.com   Read more »
Member
Search This Blog