List some similarities and differences between ThinkPHP5 and ThinkPHP3

The official said, don’t use 3 thinking to use 5. Let's put it this way, they are two official products, not related to version iterations. The directory structure is different, and some function names are different. If it is a traditional mvc website, use tp3.2. If you are making an interface, use tp5. The main difference between before and after should be the processing of view.

Model instantiation

TP5 cancels the M method of automatically instantiating the model and uses a new instantiated model instead method. Without automatic instantiation, you must create a new model class yourself and instantiate it yourself. This is somewhat similar to the D method. There is a model method that has a similar function to the D method. It can be completely replaced in function.

U method

U method is TP The built-in method of generating routes in , now this method can be completely replaced by the url method

IS_GET and IS_POST methods are canceled in TP5

If If you want to continue using it, you can customize it in the project, as follows:

 define('IS_GET',Request::instance()->isGet()); define('IS_POST',       Request::instance()->isPost());

The original TP’s I method

The previous TP had an I The method is used to receive request parameters. Currently, the input method can be used instead.

It should be noted that the new method

is now a single new method. Changed to save method, this is the previous update method, and it should be noted that the update method is also different. You can use save directly to add new items, and you need to add isUpdate(true)

when updating.

model("")->isUpdate(true)->save($data);

TP5和原来版本TP差距最大的功能性的地方在返回，现在几乎所有的数据库查询都会返回对象

$menuurl->find($menu_id);//此方法返回一个对象，可以使用->toArray()方法转换为数组$this->where($condition)->order($order)->select();//此方法返回一个对象数组，所以要使用数据也必须转换，当然可以直接用对象

C方法被config方法替换

数据库配置单独在database.php中，想获取参数使用

config('database.prefix')

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页面中目前有自定义常量的方法，使用配置的方法类似之前版本

<p style="text-indent: 0em; line-height: normal;"><span style="font-size: 16px;">如果需要全局替换的话，可以直接在配置文件中添加：'view_replace_str'  =>  [    '__PUBLIC__'=>'/public/',    '__ROOT__' => '/',<br>]<br>或者直接使用常量配置<br>{$Think.config.PUBLIC}</span></p>

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默认的引擎标签可修改，也就是之前的<>这种可以继续用

      // 模板引擎普通标签开始标记
       'tpl_begin'    => '{',        // 模板引擎普通标签结束标记
       'tpl_end'      => '}',        // 标签库标签开始标记
       'taglib_begin' => '{',        // 标签库标签结束标记
       'taglib_end'   => '}',

本文讲解了ThinkPHP5与ThinkPHP3的一些异同点，更多相关内容请关注php中文网。

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