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@ 2014-08-04T20:25:54Z

<?php

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

$result = $testArray;
foreach(explode('.', $path) as $key) {
    if(isset($result[$key])) {
        $result = $result[$key];
    }
}
print_r($result);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

36.49 ms | 402 KiB | 5 Q