在几种情况下,我们会需要进行PHP扩展开发:
1、PHP本身无法访问的资源或是调用,
2、通过扩展的方式可以实现处于性能和效率的考虑,
3、用C实现会更好
4、处于商业或代码保护考虑,将代码封装起来
5、为了更深入的了解PHP,从这里入门
假设有这么一个扩展,提供一个叫ccvita_string的函数。下面详细介绍怎么样制作这样一个PHP扩展:
第一步、生成代码
PHP为了扩展开发的方便,提供了一个类似代码生成器的工具ext_skel,具体可以参见说明。首先我们创建一个文件scutephp.skel,它的内容为
string scutephp_string(string str)
就是告诉ext_skel这个东西,我们要做的扩展里面有个函数叫scutephp_string。然后执行
cd usr/src/php-5.3.8/ext/<br />./ext_skel --extname=scutephp --proto=scutephp.skel<br />cd scutephp/
这时候,ccvita这个扩展的代码框架就已经出来了。
第二步、修改配置
然后修改config.m4文件将10、11、12三行最前面的dnl删除掉,就是将dnl PHP_ARG_WITH(ccvita, for ccvita support,<br />dnl Make sure that the comment is aligned:<br />dnl [ --with-scutephp Include scutephp support])
修改为
PHP_ARG_WITH(scutephp, for scutephp support,<br />Make sure that the comment is aligned:<br />[ --with-scutephp Include scutephp support])
第三步、实现功能
修改源码scutephp.c文件找到将scutephp_string这个函数修改为
PHP_FUNCTION(scutephp_string)<br />{<br /> char *str = NULL;<br /> int argc = ZEND_NUM_ARGS();<br /> int str_len;<br /> char *result;<br /><br /> if (zend_parse_parameters(argc TSRMLS_CC, "s", &str, &str_len) == FAILURE) <br /> return;<br /><br /> str_len = spprintf(&result, 0, "<a href="%.78s">Link</a>", str);<br /> RETURN_STRINGL(result, str_len, 0); <br />}
第四步、编译扩展
保存后,开始编译/usr/local/php/bin/phpize<br />./configure --with-php-config=/usr/local/php/bin/php-config<br />make
第五步、添加扩展
这时候,一切顺利的话,该扩展已经在modules/scutephp.so这个位置了。下面就是将这个扩展加入到PHP中去,让我们PHP程序可以调用到。cp modules/scutephp.so /usr/local/php/ext/<br />vim /usr/local/php/etc/php.ini<br />extension=/usr/local/php/ext/scutephp.so #在php.ini文件最后增加这一行<br />service php-fpm restart #重启PHP服务<br />cp ccvita.php /data/www/wwwroot/default/
接下来就可以访问scutephp.php这个文件,测试扩展了。

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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