To sort a two-dimensional array by specifying items

/* $array _name: the incoming array; $row _id: An array of items to sort; $order _type: Sort by the way, ASC or DESC; */ function Array_sort ($array _name, $row _id, $order _type) { $array _temp=array (); foreach ($array _name as $key = + $value) {//cycle one layer; $array _temp[$key]= $value [$row _id];//Create a new one-dimensional array, the index value is the index value of the two-dimensional array, and the value is the value of the item to be compared by a two-dimensional array; } if ($order _type=== "ASC") { Asort ($array _temp); }else{ Arsort ($array _temp); } $result _array=array (); foreach ($array _temp as $key = + $value) {//pairs filtered array traversal; $result _array[]= $array _name[$key];//Create a new result array and assign the original passed array to the result array after changing the order of the key values (the original array is unchanged); } return $result _array; } Here is the test $arr =array (Array (' num ' =>7, ' value ' =>4), Array (' num ' =>3, ' value ' =>45), Array (' num ' =>38, ' value ' =>27)); $sortarr =array_sort ($arr, ' value ', ' ASC '); Print_r ($sortarr); ?> Copy Code

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