How to correctly implement PHP function function expansion_PHP tutorial

In this article we will give you a detailed introduction to the code example of

PHP function extension:

1. < ?php
2. function choose($name,$id, $task){
3. global $db_link;
4. .....
5. return $xx;
6. }
7. ?>

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

Another PHP function function expansion method is:

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php  </span></span></li><li><span>function choose($name,$id,<br />$task,$</span><span class="attribute">instance</span><span>=</span><span class="attribute-value">0</span><span>){  </span></li><li class="alt"><span>global $db_link;  </span></li><li><span>.....  </span></li><li class="alt"><span>return $xx;   </span></li><li><span>}  </span></li><li class="alt"><span class="tag">?></span><span> </span></span></li></ol>

The use of this function is the same as usual, except when we do not pass in $instance, such as

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

It is handled by the default $instance=0. When we need $instance to expand the PHP function, the page we call can be written like this:

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

http://www.bkjia.com/PHPjc/446108.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446108.htmlTechArticleIn this article, we will introduce you to the code examples of PHP function expansion in detail: ?php functionchoose ($name,$id,$task){ global$db_link; ..... return$xx; } ? Calling...