PHP → Tips and Tutorials → Image Manipulation

Creating a CAPTCHA in PHP with GD

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 ...

• Platforms
  • Linux,
  • Windows
• Licenses
  • Freeware

PHP Sig Generator

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.

• Platforms
  • Linux,
  • Windows,
  • FreeBSD,
  • Mac OSX,
  • Sun Solaris
• Licenses
  • Freeware

Image Resizing Class

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 ...

• Platforms
  • Linux,
  • Windows
• Licenses
  • Freeware

Function to resize image(s)

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

• Platforms
  • Linux
• Licenses
  • Freeware

Drawing Text with PHP and GD Library

How to draw text as a graphic and make dynamic buttons or hit counters.

• Platforms
  • Linux
• Licenses
  • Freeware

Upload images with mysql database

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 ...

• Platforms
  • Linux,
  • Windows,
  • FreeBSD,
  • Mac OSX,
  • Sun Solaris
• Licenses
  • PHP License

Banner Maker

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

• Platforms
  • Linux
• Licenses
  • Freeware

Sorting images based on their Pixel Dimension.

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 ...

• Platforms
  • Linux,
  • Windows
• Licenses
  • GPL

Watermarking on the fly with PHP

PHP, coupled with Apache rewriting, lets watermark &"on the fly&" and transparently, without modifying the original image.

• Platforms
  • Linux
• Licenses
  • Commercial License,
  • Free for non-commercial use

Creating An Image Upload Script

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

• Platforms
  • Linux
• Licenses
  • Freeware

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