Note: If zlib is already installed on the system, be aware of compatibility issues between the zlib and libpng versions, the zlib-1.2.8 and libpng-1.5.20 are currently known to be installed normally, but the following error will be reported when installing with libpng-1.6.16: Install Libpng,libpng Installation We use the default option.
HOW TO INSTALL LIBGD ON CENTOS 7 INSTALL SOFTWARE
The Libpng package contains libpng libraries that can be used by other software to process image files for PNG suffixes. So before installing the GD library, we need to install libpng, JPEGSRC, FreeType these three software. The GD library supports common picture formats such as JPG, PNG, and GIF. The GD library is an open source image processing library that provides a series of APIs for working with pictures so that they can be used to create diagrams, graphs, thumbnails, and other image processing operations. The installation of the GD library is divided into the following steps:
HOW TO INSTALL LIBGD ON CENTOS 7 INSTALL HOW TO
Let's begin by introducing how to install the GD library for a compiled PHP environment. Although the GD library is not installed, we can still install the GD library by compiling it separately. The current server environment is nginx+php-fpm,php using the source code to minimize the installation, so there is no installation of the GD library. Use the PHP probe to see that PHP does not have the GD library installed. However, when you install the system, you are prompted for a missing GD library.
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