Image Manipulation

This tutorial will show you how to rotate an image in your PHP scripts. You'll need to have the GD library installed to be able to use some of the functions we use in this guide, though this is included with most PHP installations so there's a chance you'll have it.

This tutorial describes how to write text on to an existing PNG image using image functions in PHP by using a simple example. Each step is clearly described to make it easy to follow.

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.

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.

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.

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).

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.

This function can be used to resize images (with gif,png and jpg extensions) in PHP. Very easy to use in any PHP script.

A guide to creating a basic script for allowing users to upload images to your website.

Provided script could be used as "text rasterization service" to generate arbitrarily text-images for a web site. MD5-based authorization is used to avoid image generation by unauthorized users.

This comprehensive tutorial guides you through step-by-step in the process of uploading, verifying and storing images with PHP. A database is required for storing information about the images. All code is provided.

Taking the smaller size between the width and height of an image, we crop that image to obtain a square which we save into a file. Online demo available.

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.

This tutorial shows how you can automate the process of adding watermarks on images from your site right when they are uploaded.

Built-in PHP library gd does not have ready-to-use function for photo(jpeg) thumbnail generation. Although there are many such examples on the net, they are usually not suitable for effective generating series of thumbnails (for ex. 240x240, 140x140, 80x80). This article provides php function thumbnail_generator and trivial image uploading script, which generates series of thumbnails.

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.