Split a string into keys of associative arrays (PHP) [duplicate]

Question

Do you have an idea, how can a string be converted to a variable, e.g.

there is a string -> $string = 'one|two|three';
there is an array -> $arr = array('one' => array('two' => array('three' => 'WELCOME')));

I want to use all with explode(); exploded values to access the array $arr. I tried this code:

$c = explode('|', $string);
$str = 'arr[' . implode('][', $c) . ']';

echo $$str;

It doesnt work, sadly :( Any ideas?

no, i don't want to insert any values, i want to read them. The array exists already — Niklas Scherden
– Niklas Scherden, Commented Aug 16, 2014 at 20:27
Related Convert dot syntax like "this.that.other" to multi-dimensional array in PHP — mickmackusa
– mickmackusa ♦, Commented Sep 23, 2024 at 7:17

Justin Iurman · Accepted Answer · 2014-08-16 20:54:46Z

1

You're doing it wrong.
You can do what you want with a loop to go through the array level by level

$string = 'one|two|three';
$arr = array('one' => array('two' => array('three' => 'WELCOME')));

$c = explode('|', $string);
$result = $arr;

foreach($c as $key)
    $result = $result[$key];

echo $result; // WELCOME

edited Aug 16, 2014 at 20:54

answered Aug 16, 2014 at 20:43

Justin Iurman

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u_mulder · Accepted Answer · 2014-08-16 20:43:32Z

0

Here's a sort of recursive function:

$ex_keys = array('one', 'two', 'three');
$ex_arr = array('one' => array('two' => array('three' => 'WELCOME')));

function get_recursive_var($keys, $arr) {
    if (sizeof($keys) == 1)
        return $arr[$keys[0]];
    else {
        $key = array_shift($keys);
        return get_recursive_var($keys, $arr[$key]);
    }
}

var_dump(get_recursive_var($ex_keys, $ex_arr));

answered Aug 16, 2014 at 20:43

u_mulder

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