如何使用数组值获取变量变量

Question

How I can use variable variables with array to get result like is below?

I've tried so far:

// $g_module_id_bar_1['id'] = 5;

$i = 1;

$variablename = 'g_module_id_bar_'.$i;
$key = '\'id\'';

echo $$variablename[$key];

Result should be: 5

Answer 1

You almost had it.

Change $key = '\'id\''; too $key='id';

The reason is because PHP understands that $key contains a string. When accessing an array noramlly, you wouldn't do something like:

 <?php     
 $var = array("hello"=>"world");   
 echo $var["'hello'"];

which is effectively what you were doing

See for full solution: https://3v4l.org/qk5ZL