Home > Backend Development > PHP Tutorial > php函数指定默认值方法的小例子_php实例

php函数指定默认值方法的小例子_php实例

WBOY
Release: 2016-06-07 17:22:52
Original
712 people have browsed it

本节内容:
php函数指定默认值
在php编程中,为自定义函数设定默认值,当用户调用该函数时,如果不给参数指定值,参数会用默认值顶替。
例1,

复制代码 代码如下:



php函数指定默认值-www.php.net


function printMe($param = NULL)
{
   print $param;
}
printMe("This is test");
printMe();
?>


输出结果:
This is test
例2,php函数参数默认值的使用范例,php函数参数中设置和使用默认值。
代码:

复制代码 代码如下:


 
  php函数参数默认值 - www.php.net
 
 
    function textonweb ($content, $fontsize=3){
     echo "$content";
  }
  textonweb ("A
", 7);
  textonweb ("AA.
");
  textonweb ("AAA.
");
  textonweb ("AAAA!
");
  ?>
 
 
Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template