The core idea of implementing chain operation in PHP

This article mainly introduces the core idea of chain operation in PHP, this article focuses on its core ideas, more intuitive, the need for friends can refer to the

The implementation of PHP chain-type operation

The code is as follows:

$db->where ()->limit ()->order ();

Create the database.php under Common.

Chain operation is the core of the place: in the final return $this method;

database.php:

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<?php namespace Common; Class database{function where ($where) {return $this;//Chain method The most central place is: After each method return $this} function order ($order) {retur n $this; function Limit ($limit) {return $this;}}

index.php:

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<?php define (' BASEDIR ', __dir__); Define root constants include BASEDIR. ' /common/loader.php ';   Spl_autoload_register (' commonloader::autoload ');   $db = new Commondatabase (); Traditional operations require multiple lines of code implementation//$DB->where (' id = 1 '); $db->where (' name = 2 '); $db->order (' id desc ');   $db->limit (10); With chained operations, one line of code solves the problem $db->where (' id = 1 ')->where (' name = 2 ')->order (' id desc ')->limit (10);

When using a chained operation, the IDE (NetBeans gives an automatic prompt):