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This article mainly introduces the detailed examples of the principles of chain operation in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.
There are multiple methods in a class. When you instantiate this class and call the method, you can only call it one by one, similar to:
db.php
<?php class db { public function where() { //code here } public function order() { //code here } public function limit() { //code here } }
index.php
<?php $db = new db(); $db->where(); $db->order(); $db->limit();
If you want to implement chain calls, you need to add return $this at the end of the method.
db.php
<?php class db { public function where() { //code here return $this; } public function order() { //code here return $this; } public function limit() { //code here return $this; } }
index.php
<?php $db = new db(); $db->where()->order()->limit();
Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.
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