2014.01.20数组遍历（1）

<?php

   /*php数组的多种声明

     

   */

     header("content-type:text/html; charset=utf-8");

     //1.索引数组

     $user[0]=1;

     $user[1]="zhangshan";

     $user[2]="sex";

     $user[3]=20;

     echo"<pre>";

     print_r($user);

     //关联数组

     $class["name"]="lee";

     $class["age"]=20;

     $class["sex"]="nan";

     echo"<pre>";

     echo$class;

     //使用array（）函数声明

     $user=array(1,"lee","nan");

     //这种声明方式是默认为索引数组/

     echo"<pre>";

     print_r($user);

     

     //要想指定下标则需要使用键值符号=>

     $user=array("id"=>1,1=>"lee","sex"=>"nan");

     echo"<pre>";

     print_r ($user);

     //多维数组

     $user=array(

        

        array(1,"zhansan","nan"),

        //为第0个数组

        array(2,"lisi","nan"),

        //为第1个数组

        array(3,"wwu","nan"),

        //为第2个数组

        );

     echo $user[1][1];

     //或者直接给里面的数组给下标

      $user=array(

        

        "one"=>array(1,"zhansan","nan"),

        //下标为one的数组

        "two"=>array(2,"lisi","nan"),

        //下标为two的数组

        "three"=>array(3,"wwu","nan"),

        //three

        );

     echo $user["two"][1];

     //数组遍历

     //for循环遍历

     $user=array("id","lee","nan");

     for($i=0;$i<count($user);$i++){

           echo $user[$i]."<br>";

     }

     foreach($user as $key=> $info){

                echo $key."+".$info;

     }

     

     ?>