Search code examples
phpmysqlarraysloopsinformation-schema

php to display table; column one with mysql column comments and column two transposed row results


Apologies for the perhaps poor title - It is best to display my goal visually:

I want something like this to show on the page when user goes to SomeURL.com/test.php?id=101

| Questions      | Answers       |
----------------------------------
| 1(a) First Name| Pedro         |
----------------------------------
| 1(b) Surname   | Millers       |
----------------------------------
| 2(a) Weight    | 150lbs        |
----------------------------------

This will be acheived by queries to a mysql database. Firstly:

SELECT * FROM Questionnaire WHERE idQuestionnaire=101;

Which returns:

| idQuestionnaire | FirstName    | Surname    | Weight    |
-----------------------------------------------------------
| 101             | Pedro        | Millers    | 150lbs    |

In my table settings I have Column comments set. i.e. For the Column "FirstName" the comments read "1(a) First Name". To retreive all of these comments I can do another query:

SELECT COLUMN_NAMES FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='Questionnaire';

Which returns:

| COLUMN_COMMENTS |
-------------------
| 1(a) First Name |
-------------------
| 1(b) Surname    |
-------------------
| 2(a) Weight     |
-------------------

The reason I want to automate the code with arrays/loops rather than hard code is because the actual table I am using has over 400 fields, and fields may be modified or added so I would like not to have to keep changing the php code as well when this happens. It seems like a pretty simple task but can't for the life of me find relevant documented solutions.


Solution

  • Finally, the solution. Spencer7593 got me on my way but the final code required is as follows:

    $con=mysqli_connect("localhost","user","password","test");
    if (mysqli_connect_errno($con)) {echo "MySQL conn. err:".mysqli_connect_error();}
    
     $sql = "SELECT column_comment,column_name FROM information_schema.columns  
      WHERE table_name = 'mytablename';";
     $query = mysqli_query($con,$sql) or die(mysql_error());
     $columnArray = array();
    
     while(($result = mysqli_fetch_array($query, MYSQL_ASSOC))){
    
     if($result['column_comment'])
      {
      $CurCol = $result['column_comment'];
      }
     else
      {
      $CurCol = "No text stored";
      } 
    
        $CurName = $result['column_name'];
    
        $columnArray[$CurName]=$CurCol;
    
     }
    
     //echo $columnArray['FirstName']; //test example to return "1(a) First Name"
    

    So I looped through fetch_fields to get the corresponding column comments, and then looped through the result of the answers query to display each answer down the next table column.