PHP implements the core idea of chain operations, and php chain core idea

PHP implements the core idea of chain operations, and php chain core idea

Implementation of PHP chained operations

 Copy codeThe Code is as follows:
$ Db-> where ()-> limit ()-> order ();
 

Create Database. php under Common.

The core of a chain operation is: return $ this at the end of the method;

Database. php:

<? Phpnamespace Common; class Database {function where ($ where) {return $ this; // the core of the chained method is: after each method, return $ this} function order ($ order) {return $ this;} function limit ($ limit) {return $ this ;}}

Index. php:

<? Phpdefine ('basedir' ,__ DIR _); // defines the root directory constant include BASEDIR. '/Common/Loader. php '; spl_autoload_register (' \ Common \ Loader: autoload'); $ db = new \ Common \ Database (); // traditional operations require multi-line code implementation // $ db-> where ('Id = 1'); // $ db-> where ('name = 2 '); // $ db-> order ('Id desc'); // $ db-> limit (10); // use chained operations, one line of code solves the problem $ db-> where ('Id = 1')-> where ('name = 2')-> order ('Id desc ') -> limit (10 );

When using the chain operation, ide (netbeans will automatically prompt ):