Change position of elements in an associative array in php -


i have associative array : 

$headers= array (     [module_id] => module id     [platform_id] => platform id     [package_guid] => package guid     [aggregate_package] => aggregate package     [deld] => deld )

now wish change position ofpackage id @ top resemble :

 $desired= array (     [package_guid] => package guid     [module_id] => module id     [platform_id] => platform id     [aggregate_package] => aggregate package     [deld] => deld )

i tried array_unshift method not works in case associative array. 

unset($headers['package_guid']); array_unshift($headers, 'package_guid');

how can achieve it? thanks.

unset($headers['package_guid']); array_unshift($headers, array('package_guid' => 'package guid'));

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