我们经常碰到编译安装完成php之后然后再想起要加一个扩展,上次我们公司的php就碰到一个这样的情况,我们把php从5.3.3升级到了5.6.8,然后重新编译一下,5.6.8安装完成,但是他们php说没有gd库,不能识别验证码,那我蛋疼了,只能再继续安装扩展了。可是一时忘了扩展怎么安装了,重新下载一个gd.tar.gz的源码编译也不行,还好后来找到了以前自己的文档,现在将这个方法贴出来以供后面作参考。
php解压目录 /data/php-5.6.8php安装目录/data/install/php
安装gd扩展
在安装gd之前要先安装几个其他的包,要不然gd库编译的时候会报错,如果已经安装了其他几个包的话就可以省略下面1、2步,如果有报错可以根据报错提示来进行修复
① 安装freetype [root@test ~]# tar xzvf /data/install/freetype-2.4.0.tar.gz [root@test ~]# cd /data/install/freetype-2.4.0 [root@test ~]# make && make install ② 安装jpeg [root@test ~]# tar xzvf /data/install/jpegsrc.v6b.tar.gz [root@test ~]# cd /data/install/jpeg-6b [root@test ~]# make && make install ③ 安装gd [root@test ~]# cd /data/install/php-5.6.8 [root@test php-5.6.8]# cd ext/gd/
默认是没有configure的,我们需要在php的安装目录下执行一下phpize这个命令 [root@test_qx_web gd]# /data/install/php/bin/phpize 执行完这个命令之后才会出现configure [root@test gd]# ./configure --with-php-config=/data/install/php/bin/php-config --with-png-dir --with-freetype-dir --with-jpeg-dir --with-gd [root@test gd]# make && make install [root@test gd]# echo "extension = gd.so " >> /data/install/php/etc/php.ini [root@test gd]# service php-fpm restart
2.安装redis扩展 [root@test ~]# tar zxvf redis-2.2.7.tgz [root@test ~]# cd redis-2.2.7 [root@test ~]# /usr/local/php/bin/phpize [root@test ~]# ./configure --with-php-config=/data/install/php/bin/php-config [root@test ~]# make && make install [root@test ~]# echo "extension = redis.so " >> /data/install/php/etc/php.ini [root@test ~]# service php-fpm restart
以上就是我这次安装gd和redis扩展的过程,基本编译完成php后要追加扩展基本都是这个步骤了。
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PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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