php view methods in class

PHP is a powerful programming language that is widely used in web development. It is very important for PHP developers to know how to view methods in a class. In this article, we will introduce several ways to view methods in a class in PHP.

Method 1: Use the get_class_methods function

PHP provides a get_class_methods function that can return all methods defined in a class. The syntax of this function is as follows:

array get_class_methods ( mixed $class_name )

Among them, class_name represents the name of the class to be queried, which can be a string or an instance.

The following is an example:

class MyClass {
  public function method1() {
  }

  protected function method2() {
  }

  private function method3() {
  }
}

$methods = get_class_methods('MyClass');
var_dump($methods);

Running the above code will output the following content:

array(3) {
  [0]=>
  string(8) "method1"
  [1]=>
  string(8) "method2"
  [2]=>
  string(8) "method3"
}

As you can see, through the get_class_methods function, we can get all the public, Names of protected and private methods.

Method 2: Use the ReflectionClass class

The ReflectionClass class is a built-in class in PHP, used to reflect and check information such as classes, interfaces, methods, and properties. Through the ReflectionClass class, we can get all the methods in the class. The following is an example:

class MyClass {
  public function method1() {
  }

  protected function method2() {
  }

  private function method3() {
  }
}

$class = new ReflectionClass('MyClass');
$methods = $class->getMethods();

foreach ($methods as $method) {
  echo $method->name . "\n";
}

The above code will output:

method1
method2
method3

Through the ReflectionClass class, we can get all the methods in the class, including public, protected and private methods. In addition, we can also obtain detailed information such as the access level, parameters, return type, etc. of the method.

Method 3: Use PHP documentation

PHP official documentation is one of the essential tools for PHP developers. In the PHP documentation, we can view detailed descriptions and usage of all PHP functions, classes, and methods. To see the methods in a class, you can search in the PHP documentation. For example, to view all methods in the ArrayObject class in PHP, you can search for "ArrayObject" in the PHP documentation. After entering the page of the class, you can see a list of all methods.

Summary

In this article, we introduced several ways to view methods in PHP classes, including using the get_class_methods function, the ReflectionClass class, and the PHP documentation. In actual development, we can choose different methods according to different situations in order to understand the internal structure of the class and the usage of the methods more quickly.

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