Basic knowledge of PHP GD library

Echo Phpinfo (); ?> Copy Code Save and then open phpinfo.php through the browser and search for ' GD ' to see if there are any of the following: If there is a description of the system has supported the GD library, if there is no need to recompile PHP to support the GD library. Third, GD support image format GD library by default does not support all the image format, through the above information, you can see the GD Library of the system which format of the image, JPG support is supported in JPG format, not listed will not be supported. Four, the GD function classification GD function I think can be divided into 6 major categories: 1, Get information 2, create image 3, Paint 4, copy 5, output 6, destroy >>> you may be interested in the article: PHP GD Library generation of verification Code instance PHP GD library Chinese garbled Solution PHP Verification code (GD Library Generation Verification Code) example of Linux open PHP GD library support PHP Open GD Library (Windows environment) How to open PHP GD library under Windows Linux Yum install PHP GD library Full process php5 install GD library steps to share Linux Add GD library installation steps PHP add GD library support steps in detail PHP GD library functions Daquan (collection)

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