php - 将 rawtext 更改为变量名？

Question

有没有办法可以将原始文本更改为回显中的变量名。例如将变量设置$number为number1，然后当它回显时使用$number1?

为了澄清，假设我们有一个名为的变量$number = "number1";，当我们回显时$number，它回显了一个名为的变量number1，我将如何更改number1为一个变量？像 "echo "$"."$number"; 之类的东西？

Answer 1

您可以尝试以下方法

$number = 2012 ;
$name = 'number' ;
echo $$name ; //2012
echo ${$name};  //2012
echo ${"number"} ;  //2012
echo "${$name}";  //2012

Answer 2

You can do this with two dollars instead of one. Note that this is really bad practice, and there's probably a better way to achieve your goal here.

$number = 42
$usenumber = 'number'
echo $$usenumber //echos 42

Answer 3

很容易：

$number = 'number1';
$$number = '';
var_dump(get_defined_vars());

或者

echo $number1;