Php two-dimensional array instance function grouped by key name

This article introduces an instance program for grouping and adding a php two-dimensional array with a single key name. if it is used to retrieve data from the database, it can be SELECTSUM (t_value), t_idFROMt_tableGROUPBYt_id, however, if you are dealing with similar problems in the php program, this article will introduce a php two-dimensional array to group and add an instance program with a single click name, if the data is retrieved FROM the database, select sum (t_value), t_id FROM t_table group by t_id, however, it would be a little difficult to handle similar problems in php programs. here, a function is used to handle similar problems. The code is as follows:

 $ Value) {if ($ key! = $ Target_key) {// The element values corresponding to the group key name are not added $ new_arr [$ tar_key] [$ key] + = $ value; // add the remaining element values }}} else {// if the group key name does not exist // set a new group key name, add the array elements of the group // The first dimension of the new array uses the $ num parameter to identify the order of the current group // because $ num is actually in the new array, the number of key group names, starting from 0. Therefore, you can directly use $ num to index the new group in the new array, // $ num + 1 $ new_arr [$ num] [$ target_key] = $ arr [$ target_key]; foreach ($ arr as $ key => $ value) {if ($ key! = $ Target_key) {// The element values corresponding to the group key name are not added $ new_arr [$ num] [$ key] + = $ value; // add the remaining element values }}}$ arr = array ('group _ id' => 13, 'Team _ price' => 88.00, 'satopay _ price' => 85.00, 'Team _ id' => 348, 'Origin' => 440, 'gain' => 14.45, 'quantity '=> 5 ), array ('group _ id' => 13, 'Team _ price' => 12.00, 'satopay _ price' => 11.00, 'Team _ id' => 344, 'origin' => 36, 'gain' => 2.76, 'quantity '=> 3), array ('group _ id' => 14, 'team _ price' => 4.99, 'satopay _ price' => 4.60, 'Team _ id' => 335, 'Origin' => 4.99, 'gain' => 0.31915, 'quantity '=> 1), array ('group _ id' => 14, 'Team _ price' => 12.00, 'satopay _ price' => 11.00, 'Team _ id' => 344, 'Origin' => 24, 'gain' => 1.84, 'quantity '=> 2 ), array ('group _ id' => 15, 'Team _ price' => 13.00, 'satopay _ price' => 11.00, 'Team _ id' => 344, 'origin' => 24, 'gain' => 1.84, 'quantity '=> 2),); $ new_arr = array (); foreach ($ arr as $ key => $ value) {add_array ($ value, & $ new_arr, 'group _ id '); // Here we add groups by group_id} var_dump ($ new_arr );

 

The above is a two-dimensional array instance function for php grouping by key name. I hope this article will be helpful to php developers. thank you for reading this article.