Detailed explanation of thinkphp namespace usage examples

The examples in this article describe the usage of thinkphp namespace. Share it with everyone for your reference, the details are as follows:

The new version (3.2) uses namespace to define and load class library files, solves conflicts between multiple modules, and implements a more efficient automatic loading mechanism.

You need to define the namespace where the class library is located. The path of the namespace is consistent with the directory of the class library file, so that the class can be automatically loaded. For example, the OrgUtilFile class is defined as

namespace Org\Util;
class File {
}

The path where it is located is ThinkPHP/ Library/Org/Util/File.class.php, we instantiate this class as follows:

Copy the code The code is as follows:

$class = new OrgUtilFile();

The system will automatically load the above file, This eliminates the need to import the class library file before instantiating the namespace-defined class.

The root namespace is a very key concept. Take the OrgUtilFile class above as an example. Org is a root namespace, and its corresponding initial namespace directory is the system's class library directory ThinkPHP/Liberary, which is the next level sub-directory. Directories are automatically recognized as root namespaces, and these namespaces can be used without registration.

We add a new My root namespace directory under the Library directory, and then define a Test class as follows:

namespace My;
class Test
{
   public function sayHello()
  {
    echo 'hello';
  }
}

Save the test class in ThinkPHP/Liberary/My/Test.class.php, and we can instantiate it directly The class library namespace in the

$Test = new \My\Test();
$Test->sayHello();

module is named after the module name, for example:

namespace Home\Model;
class UserModel extends \Think\Model
{
}

its class file is located in Application/Home/Model/UserModel.class.php

namespace Admin\Event;
class UserEvent {
}

its class The file is located in Application/Admin/Event/UserEvent.class.php

3.2.1 or above allows setting not to use namespaces for application class libraries. The settings in the configuration file are as follows:

Copy the codeThe code is as follows:

'APP_USE_NAMESPACE' => false,

In this way, the application class library no longer needs to use the namespace definition, but you still need to use the namespace when inheriting and calling the core class library. For example, the following application class library will not Then write namespace AdminModel;

class UserModel extends \Think\Model {
}

Special note: If you need to instantiate PHP's built-in class library or a third-party class that is not defined using a namespace in version 3.2, you need to use the following method:

$class =  new \stdClass();
$sxml =  new \SimpleXmlElement($xmlstr);

I hope that what this article describes will be helpful to everyone’s PHP programming based on the thinkPHP framework.

The above introduces the detailed explanation of thinkphp namespace usage examples, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.