Php dynamic variable names

Question

I have a variable which holds an assoc array:

$arr = [
    'key' => [
        'sub' => 'Hello'
    ]
];

I have also another varibale which is a string matching the sub key:

$str = (string) '["key"]["sub"]';

How can I make $arr var to echo the sub key in the $str variable dynamicaly? Maybe in this direction.

echo $arr . ${$str};

Thanks in advance.

http://stackoverflow.com/questions/9628176/using-a-string-path-to-set-nested-array-data — Marc B, Jan 16 '15 at 21:52
here is an example http://thegeekyland.blogspot.com/2015/11/php-dynamic-variables.html — Arlind Hajredinaj, Dec 02 '15 at 19:13

score 1 · Answer 1 · answered Jan 16 '15 at 22:00

1

Don't do this. If you have a specific requirement and you think this is the way then please ask a more general question that does not presuppose this method. But since you're just curious:

eval('echo $arr'.$str.';');

answered Jan 16 '15 at 22:00

AbraCadaver

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Php dynamic variable names

1 Answers1