【玩转微信公众平台之七】 PHP语法简单介绍
经过多篇的努力,我们终于成为了微信公众平台的开发者。但是别高兴的太早,就跟修真小说一样:修炼多年武破虚空,飞升到仙界后本以为成为了天仙即可跳出三界外,不在五行中。可实际到了仙界才发现,成仙只是修行的第一步......
没错,成为开发者也才只是第一步,因为现在你的微信公众平台还没有任何功能,说难听点就是小白,说好听点就是白马王子,说可爱点就是小白白,说黄色点就是洗白白,说...
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要想在微信公众平台添加功能,那就需要写代码;既然说到写代码,那么肯定是要用php(如果用ASP,Java也可以),既然说到php,那么你肯定要懂得php怎么用吧?如果懂得你可以不用往下看了,如果不懂?走起!
PHP是什么语言?PHP是一种创建爱你动态交互站点的强有力的服务器端脚本语言.......(其他请百度)。
1、首先介绍下php开发的工具,这个有很多选择,像我是直接使用Dreamweaver来开发,这个大家也都比较熟悉。
下载地址为:http://yunpan.cn/QiPjymeWbuceR 访问密码 e7df。安装过程贼简单,直接跳过。
当然了,SAE也提供了代码在线编辑功能,不过相对来说不是很方便。
2、下面简单介绍些php的语法
1)php的代码(脚本块)可以放置在文档的任何位置,但是要有个标志来提醒,这个标志就是以""结束。例如我下面打印一个简单的字符串:hello star
<?phpecho "hello star";?>
2)php的变量。
php中所有的变量都是以 $ 符号开始的,在声明一个变量时不需要明确变量的类型,因为php会自动把变量转换为正确的数据类型。这个与C,Java等语言有很大的差别。如下:
<?php $a = 5;//相当于int a = 5$b = "this is a string";//相当于 string b = "this is a string"?>简单解释下,上面把$a设置成5,php会自动将$a设置成整型变量。$b同样的道理。
3)php的链接操作符。
php中的连接操作符为 "."(一个英文的句号)。它可以连接字符串,当操作数中有非字符串时,会先转换成字符串,然后再将字符串连接起来,如下代码:
<?php $a = 5;$b = 6;$c = "this is a string";echo $a . $b;//输出结果为56echo $a . $c;//输出结果为 5this is a string?>4)php的运算符
这个东西说简单也简单,但讲起来有点烦琐,所以直接给个链接自己去看吧。(旁白:博主,为什么你这么懒? 博主:要你管!)
http://www.w3school.com.cn/php/php_operators.asp
5)其实掌握以上几点的话,开发一个简单的微信公众平台还是勉强够看的,剩下的内容推荐大家去w3c是这个网站上学习。上面的教程写的都很棒,是想学好php绝对不能错过的网站!
http://www.w3school.com.cn/php/index.asp
恩,扯到这里,手工!
尊重原创,转载请注明来源:http://blog.csdn.net/star530/article/details/25744137

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.


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