1 <?php
 2 
 3 $a=10;
 4 $b=‘a‘;
 5 echo $$b;   //10
 6 ?>
 7 
 8 <?php
 9     $name1=‘tom‘;
10     $name2=‘berry‘;
11     if(rand(1,10)%2){ 
12         $name=‘name1‘;    //将变量名存储在$name中
13     }else{
14         $name=‘name2‘;
15     }
16     echo $$name;   
17 
18 ?>