Group row data in a 2d array by the first 3 columns then concatenate the remaining columns in each group with commas – PHP
I want to merge a multidimensional array values if the values are the same under the 'u','v' and 'w' keys. $myarray = array ( '0' => array ( 'u' => '30', 'v' => '16', 'w' => '22', 'x' => '30',…