Online PHP editor | refs for QhELg

<?php $fieldNames = [ 'id', 'location', 'blankets', 'sleepingbags' ]; $file = new \SplFileObject( 'collections2.csv', 'rb' ); $file->setCsvControl( ",", "\"", "\\" ); $file->setFlags( \SplFileObject::READ_CSV ); $sumBlankets = []; foreach ( $file as $i => $line ) { $row = array_combine( $fieldNames, $line ); if ( !is_numeric( $row['blankets'] ) ) { throw new Exception("invalid data in 'blankets' field for location $k"); } if ( !is_numeric( $row['sleepingbags'] ) ) { throw new Exception("invalid data in 'sleepingbags' field for location $k"); } $k = $row['location']; if ( !array_key_exists( $k, $sumBlankets ) ) { $sumBlankets[$k] = [ 'blankets' => 0, 'sleepingbags' => 0 ]; } $sumBlankets[$k]['blankets'] += $row['blankets']; $sumBlankets[$k]['sleepingbags'] += $row['sleepingbags']; } $sorted = arsort( $sumBlankets ); foreach ( $sorted as $location ) { echo $location; } ?> $sumBlankets outputs Array ( [Location] => Array ( [blankets] => 0 [sleepingbags] => 0 ) [A Capella Salon] => Array ( [blankets] => 11 [sleepingbags] => 0 ) [Allegan Library] => Array ( [blankets] => 47 [sleepingbags] => 2 ) [Avente] => Array ( [blankets] => 2 [sleepingbags] => 0 ) [Biggby - Paw Paw ] => Array ( [blankets] => 13 [sleepingbags] => 1 ) [Biggby - Plainwell] => Array ( [blankets] => 28 [sleepingbags] => 3 ) [Biggby - Sprinkle] => Array ( [blankets] => 25 [sleepingbags] => 0 ) [Biggby - West Main] => Array ( [blankets] => 10 [sleepingbags] => 0 ) [Biggby - Westnedge 311] => Array ( [blankets] => 9 [sleepingbags] => 0 ) [Biggby - Westnedge BestBuy] => Array ( [blankets] => 4 [sleepingbags] => 0 ) [Biggby - Williamston] => Array ( [blankets] => 27 [sleepingbags] => 10 ) )