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<?php $string = 'sagar.surendra.desai'; $exp = explode('.', $string); print_r($exp); print_r(array('sagar' => array('surendra' => array('desai' => 'test'))));
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
Array ( [0] => sagar [1] => surendra [2] => desai ) Array ( [sagar] => Array ( [surendra] => Array ( [desai] => test ) ) )