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Get image''s DPI using PHP

This is a simple function I wrote to get a DPI (dot per inch) value from an image using PHP only, without the need of ImageMagick nor GD library.
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Phoca CAPTCHA

Phoca CAPTCHA class is a small free class to show CAPTCHA image in your form. You can safe your form from Spam. You need PHP with GD library but you need not TTF support.
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Online Thumbnail Maker

PHP class with online Flash Image Editor let you download, resize, crop and convert images. Easy to setup and use in all kinds of applications. Requires GD Library and ImageMagick.
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Imagize - Image Verification Captcha Form Processing Script

The Goal of our CAPTCHA SCRIPT is to stop spammers, and automated programs or scripts from making post and/or submitting an online form. There are many free tutorials out there on accomplishing this process, ours sets up in 5 minutes or less, and wor...
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floIcon

This class can be used to read and write icon images to files in the ICO format. It can parse ICO files and extract individual icon images into PHP GD image resources. The class can also merge ICO files and add new images to an ICO file. ...
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PHP multiple photo thumbnail generator

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,...
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myPh3 elegant image gallery

myPh3 is an image gallery PHP script that is designed to be elegant, easy to use and install and standards-compatible. Styling is easy and five designs are included. It reads your photo album directories and presents a slick user interface with aut...
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Math Captcha image validation

With all the Captcha decoders these days, its impossible to build a solid Captcha image validator with a string. The solution? Have a captcha that asks simple math addition questions! Decoders are not very good at breaking these. This tutorial ...
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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...
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CAPTCHA validation using PHP and Ajax

CAPTCHA has become a popular means of securing forms against automated submission, by requiring users to enter a string displayed in an automatically generated image. This implementation uses Ajax to conveniently combine CAPTCHA into normal pre-sub...
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