Online PHP editor | refs for ZgoaL

<?php $array = [ 'state' => [ 'WA', 'CA', 'CA', 'NV', 'MO', 'CA', 'CA', 'CA', 'CT', 'FL', 'FL', 'ID', 'ID', 'IN', 'MN', 'MN', 'NE', 'NY', 'TX', 'TX', 'WI' ], 'counties' => [ 'King, Snohomish', 'Contra Costa', 'Los Angeles', 'Clark', 'Jackson', 'Tulare', 'Sacramento', 'Riverside', 'New Haven', 'Pinellas', 'Lake', 'Canyon', 'Ada', 'Tippecanoe, White, Carroll', 'Crow Wing, Cass', 'Blue Earth', 'Douglas', 'Rockland', 'Webb', 'Harris', 'Waukesha, Milwaukee, Washington' ], 'zipcodes' => [ '98004, 98005, 98006, 98007, 98008, 98011, 98012, 98102, 98105, 98112, 98136, 98025, 98033, 98034, 98083', '94530, 94804, 94805, 94803, 94806, 94564, 94547', '91381, 91384, 91354, 91355, 91321, 91387, 91351, 91390, 91350', '89002, 89009, 89011, 89012, 89014, 89015, 89016, 89128, 89048, 89052, 89053, 89060, 89061, 89074, 94588, 89102, 89105, 89108, 89109, 89111, 89112', '64055, 64056, 64057, 64052, 64064, 64050, 64058, 64014, 64015, 64029, 64063, 64081, 64082, 64086, 64133', '','','','','','','','','','','','','','','','' ] ]; $lowestZips = []; foreach ($array['zipcodes'] as &$zips) { $zips = explode(', ', $zips); sort($zips); $lowestZips[] = $zips[0] ?: PHP_INT_MAX; $zips = implode(', ', $zips); } array_multisort( $lowestZips, $array['zipcodes'], $array['state'], $array['counties'] ); var_export($array);