变量名可以变，将变量名存储在另外一个变量中
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 ?>
https://www.cnblogs.com/chengzhongde/p/7000584.html
原文：https://www.cnblogs.com/ycchao/p/12940064.html