php显示表格； 第一列与mysql列注释和第二列转置的行结果

Question

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. ie 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.

Answer 1

I'd recommend you use the mysqli fetch_fields() function on the result set, to get information about the columns contained in the resultset, rather than querying views in INFORMATION_SCHEMA.

The fetch_fields() will work for queries that reference only a subset of columns in a table, or queries that return expressions, or return columns from more than one table.

http://php.net/manual/en/mysqli.quickstart.metadata.php

Answer 2

Try this:

(SELECT 
 "1(a) First Name" as Questions,
 Firstname as Answers
FROM Questionnaire WHERE idQuestionnaire=101)
 union
(SELECT 
 "1(b) Surname" as Questions,
  Surname as Answers
FROM Questionnaire WHERE idQuestionnaire=101)
 union
(SELECT 
 "2(a) Weight" as Questions,
 Weight as Answers
FROM Questionnaire WHERE idQuestionnaire=101);

Answer 3

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.