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@ 2014-08-04T20:27:47Z

<?php

    $string = 'router.format';
    $array = array(
        'router' => array(
            'format' => 'xml',
        ),
    );

    $string = explode('.', $string);
    $result = $array;

    for($i = 0; $i < count($string); ++$i)
    {  
        $key = $string[$i];
        if(isset($result[$key]))
            $result = $result[$key];
        else
            break;
    }

    print_r($result);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

35.91 ms | 402 KiB | 5 Q