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<?php $arr = array( "mac_address"=>"989096e255a1", "status" =>"Known", "attributes" => array( "Owner"=>"rogue@wpi.edu", "IPAM-Hostname"=>"dresden.wpi.edu", "IPAM-AdminState"=>"OK", "IPAM-NAS-IP-Address"=>"1", "IPAM-NAS-Port-ID"=>"", "IPAM-RADIUS-VLAN"=>"", "IPAM-TimeStamp"=>"2017-07-11 11:18:33 EDT", "Guest Role ID"=>"", "MAC-Auth Expiry"=>"", "Username"=>"" ) ); $filtered = array_filter($arr, function($var){return !empty($var);} ); print_r($filtered);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [mac_address] => 989096e255a1 [status] => Known [attributes] => Array ( [Owner] => rogue@wpi.edu [IPAM-Hostname] => dresden.wpi.edu [IPAM-AdminState] => OK [IPAM-NAS-IP-Address] => 1 [IPAM-NAS-Port-ID] => [IPAM-RADIUS-VLAN] => [IPAM-TimeStamp] => 2017-07-11 11:18:33 EDT [Guest Role ID] => [MAC-Auth Expiry] => [Username] => ) )

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