Skip to main content

Thumbnail creation on runtime php function

Function to create thumbnails of the images. this create thumbnails on runtime and will be displayed on browser. it accepts jpg,gif and png. the function is extendable. The function will generate thumbails of the images in the server or images from other domains.

Save the following code as thumbimage.php

the thumbnail generator is triggered by calling the page as thumbimage.php?src=sample.png

where src is the image file name. In this example the src is passed as urlencoded string.

file: thumbimage.php
function createImage( $upload, $newWidth =120) {

if (!$info = getimagesize($upload) )
return false;

//create crude aspect ratio:
$aspect = $info[0] / $info[1];
$newHeight = round( $newWidth/$aspect );


if( $mimetype == 2 )
$src = @imagecreatefromjpeg("$upload");
elseif( $mimetype == 1 )
$src = @imagecreatefromgif("$upload");
elseif( $mimetype == 3 )
$src = @imagecreatefrompng("$upload");

if ( !$src )
return false;

$tmp = @imagecreatetruecolor( $newWidth, $newHeight );
imagecopyresampled( $tmp, $src, 0, 0, 0, 0, $newWidth, $newHeight, $info[0], $info[1] );

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;

if( isset($_GET["src"]) && trim($_GET["src"]) != "" ){

// for creating thumbnails of images from other domains, then comment
//the below 'IF' condition and instead of the relative url give the absolute url

if( is_file( "/yourImageFolder/".urldecode(trim($_GET["src"]) )) )
createImage( "yourImageFolder/".trim($_GET["src"]) , 120);


Sample usage

<img src="thumbimage.php?src=sample.gif" style="border: 1px solid #000000; padding: 5px;" />
<img src="thumbimage.php?src=<?php echo(urlencode("my_test_img.jpg")); ?>" style="border: 1px solid #000000; padding: 5px;" />

Popular posts from this blog

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

Your SBI Debit card ending with XX0000 is deactivated only for Internet txn.

SBI account holders may have received an SMS with following message, supposed to be from State Bank of India (SBI).

Your SBI Debit card ending with XX0000  is deactivated only for Internet txn. To activate send SMS "SWON ECOM 0000" to 09223966666. No change for ATM/POS usage
** Replace the four Zeros with last 4 digits of your debit card number

Recently many of the SBI account holder has losed their money due to a hi-tech ATM robbery which happened in Thiruvananthapuram, capital city of Kerala.

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  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   Read more »
Search This Blog