How to implement PHPfunction function extension correctly _ PHP Tutorial

How to correctly implement PHPfunction function extension. In this article, we will introduce in detail the sample code for PHPfunction function extension :? Phpfunctionchoose ($ name, $ id, $ task) {global $ db_link; ...... return $ xx ;}? In this article, we will introduce you in detail.

PHP function extension code example:

1. <? Php
2. Function choose ($ name, $ id, $ task ){
3. Global $ db_link;
4. .....
5. Return $ xx;
6. }
7. ?>

On the called page, it is often $ tmp = choose ($ name, $ id, $ task );

Another PHP function extension method is:

 

  
< ?php  
  
function choose($name,$id,
$task,$instance=0){  
  
global $db_link;  
  
.....  
  
return $xx;   
  
}  
  
?> 
 

The usage of this function is no different from that of the normal operation, but when we do not input $ instance, as shown in

$ Array = choose ($ name, $ id, $ task );

It is handled by default $ instance = 0. when we need $ instance for PHP function extension, the page we call can be written as follows:

$ Instance = "...";
$ Array = choose ($ name, $ id, $ task, $ instance)

Example code of function extension for using PHP functions :? Php functionchoose ($ name, $ id, $ task) {global $ db_link; ...... return $ xx ;}? In the tune...