构造php变量的名称

Question

$service3_step1_person = ‘999’;    
echo $service3_step1_person;    //999

然后...

$service = "service3";    
echo "$".$service."_step1_person;  //$service3_step1_person

它不给我999,只给我一串$service3_step1_person.

如何使字符串成为新的变量名？谢谢!

Answer 1

echo ${$service."_step1_person"};