PHP → Tips and Tutorials → Image Manipulation

Create Thumbnail Images using PHP

This tutorial will describe how to create thumbnail images on the fly using PHP. Furthermore you will learn how to process a whole folder of images and create their thumbnails. Since this requires the GD library, you will need an installation of PHP ...

• Platforms
  • Linux
• Licenses
  • Freeware

Image Uploader

In this tutorial learn how to make an image uploader and give each file a random name so it can never be over written, which is a common error in some tutorial image uploaders.

• Platforms
  • Linux
• Licenses
  • Freeware

Simple Random Image Generator

This is the Simplest random Image Generator on the net composing of just a couple of lines of code. Although the script does nothing fancy it works wonders in reducing your server load which some of these larger scripts may do.

• Platforms
  • Linux
• Licenses
  • Freeware

Create a copy of an image as a thumbnail

You get a great function that use the GD library to create the new thumbnail file. Often you need to change the size/dimensions of images in your web site. One example could be if you let your visitors upload an image of themself when they regi...

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

PHP class for basic image manipulation

A class providing a set of methods for doing basic transformation to an image like resizing, rotating and flipping. the class is very small (only about 18Kb in size but still heavily documented) and as i said it only covers some basic methods so don&...

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

Display a different image for each day of the week

This PHP script will get the day of the week from the server date and then display an image (jpg or gif) to match.

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

Image Verification (Captcha) For Forms

This is a sample script that allows you to add image verification to your HTML forms. It includes a sample implementation, PHP code check and extras (Font+Background).

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

Thumbnail generator

This simple function will accept an image, directory listing and image size and outputs a thumbnail with the specifications.

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

Dynamic Image Generation using PHP

Creating images on the fly can be a very useful skill. In this tutorial we will show you how to get quite interesting and useful effects using image handling functions. We will review two practical tasks: creating security images (captcha) on the fly...

• Platforms
  • Linux
• Licenses
  • Freeware

Converting RGB values from/to HTML hex representation.

This article provides two functions for converting HTML color (like #AAED43) to three RGB values ($r = 170, $g = 237, $b = 67) and converting RGB values to HTML color.

• Platforms
  • Linux,
  • Windows,
  • FreeBSD,
  • Mac OSX,
  • Sun Solaris
• Licenses
  • Other Free / Open Source License

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