Static and non-static tasks in PHP

In PHP, static and non-static things can also call non-static methods. let's just look at the code: error_reporting (E_ALL); Report all error messages to classTest {publicstaticfunctiontest1 () {$ this-& gt; test2 (); in this case, an error is returned. static and non-static tasks in $ this PHP cannot be used for static methods.

Static methods can also be called.

Simply look at the code:

Error_reporting (E_ALL); // report all error messages to class Test {public static function test1 () {// $ this-> test2 (); // this is definitely an error. the static method cannot use $ this // If you have to call test2 () here, you can use the following method, method 1 $ instance = new Test (); $ instance-> test2 (); // or use a simpler method called Method 2 (PHP will give a call warning) self:: test2 ();} public function test2 () {echo 'test static function';} test: test1 ();

Here are some notes,
1. Method 1: Create an object and call the method of this object. This does not conflict with each other.
2. for details about how method 2 can call non-static methods, refer to the article: PHP Calling Scope
Method 2: generate the following warning:

In practical applicationsTry to avoidUse ":" To call a non-static method.

The call of static methods by non-static methods is so coquetry.

I think I am also drunk and can still use $ this to call non-static methods. Check the code:

Error_reporting (E_ALL); class Test2 {public static function test1 () {echo 'Good test
';} // You can imagine why I did not write the test2 () method name here? Jump from 1 to 3 public function test3 () {self: test1 (); // you can do this, no problem static: test1 (); // this does not explain $ this-> test1 (); // focus on it} $ Obj = new Test2 (); $ Obj-> test3 ();

I was taken aback by writing code verification when $ this was actually able to call static methods. It is reasonable to think about it. why?
Listen to your younger brother.

Have you ever called the code like this:

$obj = new Test2();$obj->test1();

OK. in php, you can call non-static methods in static mode, or call static methods in non-static mode. It's a fair language. I Love You (che) and you are dead (dan!
If you can understand the preceding method$this->test1()It should be understandable,$thisIt is equivalent to the currently called object and can be understood as the new$obj. As an object, you can certainly call all its internal methods, right? I don't want to explain it. it's all nonsense.