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This article mainly introduces "how to write php classes". In daily operation, I believe many people have doubts about how to write php classes. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts of "how to write php classes". Next, please follow the editor to study!

In php, the class defines the abstract characteristics of a thing, including the form of the data and the operation on the data, and defines the syntax format of the class, such as "class phpClass {var $var1;function myfunc ($arg1, $arg2) {.}}".

This article operating environment: Windows7 system, PHP7.1 version, DELL G3 computer

What is the writing of the php class?

The class − defines the abstract characteristics of a thing. The definition of the class includes the form of the data and the manipulation of the data.

PHP class definition

The general syntax format of the PHP definition class is as follows:

The resolution is as follows:

The class uses the class keyword followed by the class name definition.

Variables and methods can be defined in a pair of curly braces ({}) after the class name.

Variables of a class are declared using var, and variables can also initialize values.

The function definition is similar to the definition of the PHP function, but the function can only be accessed through the class and its instantiated object.

Example

The variable $this represents its own object.

PHP_EOL is a newline character.

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