php sort array by object value
/** * A generic PHP sorting algorithm that uses `usort` and `strcmp`. * `usort` — Sort an array by values using a user-defined comparison function. * `strcmp` — Returns < 0 if param 1 is less than param 2; > 0 if param 1 is greater than param 2, and 0 if they are equal. */ $questions = [ { id: 1, ordinal: 55 }, { id: 2, ordinal: 67 }, { id: 3, ordinal: 32 }, ]; function sortByOrdinal($param1, $param2) { return strcmp($param1->ordinal, $param2->ordinal); } /* `usort` alters an existing array. */ usort($questions, "sortByOrdinal"); /** * $questions = [ * { id: 3, ordinal: 32 }, * { id: 1, ordinal: 55 }, * { id: 2, ordinal: 67 }, * ]; */
