Online PHP editor | refs for JKhtR

<?php function sanitizeColumnReference($row, $columnReference) { if (!isset($row[$columnReference]) && is_int($columnReference)) { $columnReference = array_keys($row)[$columnReference] ?? null; // attempt to derive column name by position if ($columnReference === null) { throw new Exception('Failed to locate column by position using column reference: ' . $columnReference); } } return $columnReference; } function dynamicSort(&$input, $sortingRules) { if (!$input || !$sortingRules || !is_array($input) || !is_array($sortingRules)) { return; // return silently } $firstRow = current($input); $sortingParams = []; foreach ($sortingRules as $rule) { $rule = (array)$rule; // permit the passing of a solitary string as a sorting rule $columnReference = sanitizeColumnReference($firstRow, array_shift($rule)); $column = array_column($input, $columnReference); if (!$column) { throw new Exception('Failed to source sortable data from column reference: ' . $columnReference); } $sortingParams[] = $column; foreach ($rule as $flag) { $sortingParams[] = constant('SORT_' . strtoupper($flag)); // convert strings to usable CONSTANTs } } $sortingParams[] = &$input; var_export($sortingParams); array_multisort(...$sortingParams); // unpack into native sorting function } $array = [ ['first_name' => 'Homer', 'last_name' => 'Simpson', 'city' => 'Springfield', 'state' => 'Unknown', 'zip' => '66735'], ['first_name' => 'Patty', 'last_name' => 'Bouvier', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85250'], ['first_name' => 'Moe', 'last_name' => 'Szyslak', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255'], ['first_name' => 'Nick', 'last_name' => 'Riviera', 'city' => 'Scottsdale', 'state' => 'Arizona', 'zip' => '85255'], ]; $sortingRules = [ 'city', ['zip', 'desc', 'numeric'], [1, 'desc'], // last_name ]; echo "Sorting Params:\n"; dynamicSort($array, $sortingRules); // this modifies by reference like native sorting functions echo "\n---\nOutput:\n"; var_export($array);