Image Manipulation

In this tutorial I will show you how to create a simple photo gallery. The script creates thumbnail images if needed and displays all images in the given directory.

In this tutorial I will show you how to resize an image with PHP. You can use this function in your own image gallery implementation or in any other cases when you need to create a thumbnail from your image. Using a this image resize script gives you the possibility to create various images which are different in their size. ...
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A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a system designed to test if input is originating from a human or a computer. This tutorial will explain how to make your own CAPTCHA using PHP and the bundled GD image manipulation library....
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This tutorial will demonstrate how to resize images with PHP. The ability to resize images is useful for creating thumbnails for image galleries.

The code sample demonstrates the use of GD library to apply round corners on an image on-the-fly. It allows you to apply round corners of arbitrary size and color on a GIF, JPEG or PNG image. The source image is read on-demand and sent directly to the browser. This script can potentially eliminate the need of a graphics editing program to apply round corners on tons of images plus revising the images (e.g. when the color scheme or layout of the website changes) is not required....
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The article along with complete code sample demonstrates the use of PHP and GD library to watermark uploaded images on the fly. The method demonstrated here to watermark an uploaded image is to render a partially transparent line of text over the original image....
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The article along with complete code sample demonstrates the use of GD library to generate thumbnails. The script first saves the uploaded image in a specific location, it then generates a thumbnail version of the image and finally saves the generated thumbnail image in JPEG format. The article also includes explanation of the calculations involved and a few other tips....
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This setp-by-step article explains how to create a database-driven image uploading and display system in PHP. The example database used being MySQL, it also discusses possible modifications for MS SQL and Oracle. Some of the main topics include: Create database table with a field defined to hold binary data, Get your binary data into your table through a form-based file upload script, and Retrieve your binary data and display it to the user....
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This PHP can be used for achieving watermarking task easily. I hope it will help you too.

In many scenarios you cannot escape uploading images when you develop a php script. This tutorial details how you can upload images using php and auto creates thumbnails on image upload.

This tutorial can give you an idea of how to center a text on an image using the GD Library. The script creates an image and centers a text on it.

This is a PHP Class useful if you need to resize images keeping their aspect ratio, using the GD Library. The new height is calculated proportionally to the new width’s size and reverse. For instance you have an image with the following dimensions: width - 1000, height - 800. Its thumbnail with a width of 250 will have the height of 200 (the ratio is kept)....
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Use this tool to generate code that displays an image of your choice, with text displayed on it. The text is randomly taken from a list you make.

This class can be used to resize images preserving the aspect ratio.It can open a JPEG, PNG or GIFimage and resize it in such way that neither the width nor the height exceed given size limits.The image is resized to preserve the original proportion between the width and height.The resized image is generated in the JPEG format overwriting the original image file....
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This function can be used to resize images (with gif,png and jpg extensions) in PHP. Very easy to use in any PHP script.

In this tutorial is presented a simple code with informations about programing a script that uses MYSQL database to upload images. Very simple to interpretate, to code and to test, its a simple way to learn how to program a upload script that select images from the MYSQL database using php programing....
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How to draw text as a graphic and make dynamic buttons or hit counters.

This tutorial will show you how to create a simple 468 x 60 banner online.

JPEG compresses an image based on the color information present in the image (2). Thus, the file sizes are not a true representation of how large an image is when displayed on screen. In trying to sort out small images based on their width or height we face the challenge of sorting images which are unusually tall or wide. Hence, sorting images based on their pixel dimension is a more accurate way of sorting images into groups....
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PHP, coupled with Apache rewriting, lets watermark "on the fly" and transparently, without modifying the original image.