dongqian6484 2018-07-30 10:01
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如何使用数组值获取变量变量

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

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2条回答 默认 最新

  • doulong2782 2018-07-30 10:03
    关注

    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

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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