How to get variable variable with array value

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

What version of PHP are you using? The changes made to Uniform Variable Syntax in PHP 7 will have an effect on how the last line is processed. — iainn
– iainn, Commented Jul 30, 2018 at 10:07

JustBaron · Accepted Answer · 2018-07-30 10:11:59Z

3

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

JustBaron

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answered Jul 30, 2018 at 10:03

IsThisJavascript

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2 Comments

Ok, it was my mistake. Thanks for help.

@AdamMakowski =) np

AymDev · Accepted Answer · 2018-07-30 10:04:35Z

1

You are trying to escape single quotes but this is useless, just use the string key:

$key = 'id';
echo $$variablename[$key]; // 5

answered Jul 30, 2018 at 10:04

AymDev

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