PHP学习之函数篇

<?php
 #参数按引用传递
 function Test(&$num)
 {
     $num += 200;
 }
 
 $c = 100;
 Test($c);
 echo "<br/>".$c;
 
 #默认参数值
 function GetList($pageIndex = 1){
     printf("<br/>当前获取第%d页的数据",$pageIndex);
 }
 
 GetList();
 GetList(2);
 GetList(3);
 
 #函数返回多个值
 function GetInfos(){
     $info[] = "zhangsan";
     $info[] = "男";
     $info[] = 20;
     return $info;
 }
 
 list($name,$sex,$age) = GetInfos();
 printf("<br/>name:%s,sex:%s,age:%d",$name,$sex,$age);
?>