通过在php中连接字符串来创建变量名

Question

i have a file questions.php with an array as follows :

$question12 = array("Which is the tallest mountain","Mt Everest");

i am using this file in another file as follows :

require_once('questions.php');
$var = 12;
$question = '$question'.$var.'[0]';
echo $question;

The above code just outputs the string

$question12[0]

But i want the variable $question to have the string present in $question12[0].

How to do it..??

Answer 1

Variable variable is not recommended, but the answer is below:

$question = ${'question'.$var}[0];