July 2019 Monday 22 May, simply summarize

// What is class? ? ?

　　Class is a collection of objects with the same set of attributes and services. It provides a unified description of all abstract objects belonging to this class, including its internal properties and services of two main parts

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// definition of a class using the class name of the class to write code braces {} internal

// class name to make use of uppercase letter

　　class Person{   }

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// use var to declare a variable interior, but: try not to give this variable initial values, because values ​​are all given initial value after the call

　　class Person {var $ name; var $ age; etc.} ------

　　class Person{

 　　var $name;

 　　was $ age;

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// method declaration can declare multiple remember, but can not be repeated Oh! ! !

function sun(){

Echo "Singing";

}

  }

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 // instantiate the class keyword to instantiate new class instance variables but after numerous instances of pay can not avoid repeat

 $ Obj = new Person (); // parentheses

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 // $ this can also be used to represent the object, the object to complete the internal members call

function run(){

Echo "My name is:" $ this-> name "My gender is:" $ this-> sex "my age is" $ this-> age "I will sing";......

} // This completes the call to the internal autonomy but these internal variables are outside paid the value is as follows:

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// we can use to find the object after the instantiation of the internal variable assignment, the key symbol "->"; he is a special operator to complete the access object members

 $ Obj-> name = "Liu Hongji";

   $obj->age=”17”;

   $ Obj-> sex = "male";

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After // var_dump assignment can be used directly to print the object can not be used because the echo echo out of the output can only be a string, this will directly output error

 var_dump ($ obj);

// Finally, use the object name to call this method to

 $obj->run();

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