mark一个php安装gd拓展的文章
mark一个php安装gd拓展的文章
源地址:http://www.heiok.com/?p=517
由于PHP是源码编译安装的,所以以上两个扩展都没安装,下面是为PHP添加这两个扩展的过程:
一、安装GD扩展
1.下载安装GD库扩展所需源码包(可点击源码包直接下载)
gd-2.0.35.tar.gz http://www.libgd.org/releases/
jpegsrc.v8b.tar.gz http://www.ijg.org/
libpng-1.5.0.tar.gz http://sourceforge.net/projects/libpng/
freetype-2.4.4.tar.gz http://sourceforge.net/projects/freetype/
zlib-1.2.3.tar.gz
2.分别编译安装各个源码包
安装zlib
tar zxvf zlib-1.2.3.tar.gz
cd zlib-1.2.3
./configure
make
make install
安装libpng
tar zxvf libpng-1.5.0.tar.tar
cd libpng-1.5.0
cd scripts
mv makefile.linux ../makefile
cd ..
make
make install
安装freetype
tar zxvf freetype-2.4.4.tar.gz
cd freetype-2.4.4
./configure
make
make install
安装Jpeg
tar zxvf jpegsrc.v8b.tar.gz
cd jpeg-8b
./configure -enable-shared
make
make test
make install
注意,这里configure一定要带-enable-shared参数,不然,不会生成共享库
安装GD库
tar zxvf gd-2.0.33.tar.gz
cd gd-2.0.33
./configure -with-png -with-freetype -with-jpeg
make install
3.重新编译安装PHP(即是在以前编译PHP的参数后面再加上以上安装的相关参数)
cd php-5.3.4 (进入以前的PHP源码目录)
./configure –prefix=/opt/php –with-mysql=/opt/mysql –with-apxs2=/opt/apache/bin/apxs –enable-track-vars –enable-force-cgi-redirect –with-config-file-path=/opt/php/etc –with-gd –enable-gd-native-ttf –with-zlib –with-png –with-jpeg –with-freetype –enable-sockets
绿色字体部份是以前安装PHP时所加的参数
make
make install
这样GD库扩展便安装完毕,重启Apache,查看PHP信息测试页便可看到gd项;

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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