php - Can I use PDO::FETCH_GROUP to group results by two values -


I am using PHP and PDO to recover a set of values ​​from a database and then from the first column to the group Code with this: $ result = $ sth- & gt; Get All (PDO :: FETCH_GROUP | PDO :: FETCH_NUM); This means that if my data is in this format: 

  | Column1. Column2. Column 3 | 1 | 2 | One | | 1 | 2 | B   
 It comes back in this form:  
  1: {[column2: 2, column3: a], [Column 2: 2, Column 3: B]}   
 How do I group the columns by column 1 and column 2, so I get something:  
  1: {2: { Column3: a, Column3: b}}   
 Is it possible to do this with a combination of PDO constants?  
 Thank you   
 
 
 As you've seen, it's easy to easily arrange an array Grouping with code with  PDO :: FETCH_GROUP  can be easy. What needs to be done is to convert the 2-dimension array into a 3-dimensional array, but  it is not possible  to rebuild it this way.  
 You need this to manually do it manually through the nested loop, such as:  
  // Assume that the result of $ is: $ Result = [[1, 2, 'a'], [1, 2, 'b']]; $ newResult = []; Foreign Currency ($ $ as result of $) {$ newResult [$ line [0]] [$ row [1]] [] = $ line [2]; } Var_dump ($ newResult);   
 Here returns:  
  array (1) {[1] = & gt; Array (1) {[2] = & gt; Array (2) {[0] = & gt; String (1) "a" [1] = & gt; String (1) "b"}}}   
 And it looks like you.

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