How to fetch field type and value?

Question

I am currently trying to build a form using mysql/php, below is part of the code I have so far

BLOCK#1:

$proceso = mysqli_fetch_asso         


        

Answer 1

Edit: I put the output in a table because I can't sleep...

Okay... see if this is what you want...

This is a table I made for a different SO question:

mysql> describe user;
+-------------+------------------+------+-----+---------+----------------+
| Field       | Type             | Null | Key | Default | Extra          |
+-------------+------------------+------+-----+---------+----------------+
| User_ID     | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| Email       | varchar(100)     | YES  |     | NULL    |                |
| Name        | varchar(100)     | YES  |     | NULL    |                |
| Password    | varchar(100)     | YES  |     | NULL    |                |
| FB_ID       | int(11)          | YES  |     | NULL    |                |
| Total_Score | int(11)          | YES  |     | 0       |                |
| add_date    | datetime         | YES  |     | NULL    |                |
+-------------+------------------+------+-----+---------+----------------+
7 rows in set (0.00 sec)

and from the DB:

mysql> select * from user limit 1;
+---------+-------+------+----------+-------+-------------+---------------------+
| User_ID | Email | Name | Password | FB_ID | Total_Score | add_date            |
+---------+-------+------+----------+-------+-------------+---------------------+ 
|       1 | NULL  | kim  | NULL     |  NULL |          10 | 2013-11-03 23:04:08 |
+---------+-------+------+----------+-------+-------------+---------------------+
+
1 row in set (0.00 sec)

And the code:

<?php
$mysqli = mysqli_connect("localhost", "root", "", "test");

// this came from http://php.net/manual/en/mysqli-result.fetch-field-direct.php 
$mysql_data_type_hash = array(
    1=>'tinyint',
    2=>'smallint',
    3=>'int',
    4=>'float',
    5=>'double',
    7=>'timestamp',
    8=>'bigint',
    9=>'mediumint',
    10=>'date',
    11=>'time',
    12=>'datetime',
    13=>'year',
    16=>'bit',
    //252 is currently mapped to all text and blob types (MySQL 5.0.51a)
    253=>'varchar',
    254=>'char',
    246=>'decimal'
);

// run the query... 
$result = $mysqli->query("select * from user limit 1"); 

// get one row of data from the query results 
$proceso = mysqli_fetch_assoc($result);

print "<table>
        <tr>
           <th>\$key</th>
           <th>\$value</th>
           <th>\$datatype</th>
           <th>\$dt_str</th>
        </tr>  ";

// to count columns for fetch_field_direct()
$count = 0; 

// foreach column in that row...
foreach ($proceso as $key => $value) 
{
  $datatype = $result->fetch_field_direct($count)->type;  
  $dt_str   = $mysql_data_type_hash[$datatype];
  $value    = (empty($value)) ? 'null' : $value;  

  print "<tr>
           <td>$key</td>
           <td>$value</td>
           <td class='right'>$datatype</td>
           <td>$dt_str</td>
         </tr>  ";  
  $count++; 
} 

print "</table>"; 

mysqli_close($mysqli);
?> 

<style>
   /* this is css that you don't need but i was bored so i made it pretty...! */
   table   { font-family:Courier New; 
             border-color:#E5E8E3; border-style:solid; border-weight:1px; border-collapse:collapse;}
   td,th   { padding-left:5px; padding-right:5px; margin-right:20px; 
             border-color:#E5E8E3; border-style:solid; border-weight:1px; }
   .right  { text-align:right }
</style>

So... to clarify...

You can use these variables in that foreach to output or use the information however you want: (I am using my first row of output, for the user_id, as an example)

• $key is the column/field name (such as user_id)

• $field_types[$key] comes from $result->fetch_field_direct($i)->type (such as 3)

• $mysql_data_type_hash[$datatype] is the string version of the datatype using the $mysql_data_type_hash array at the top of the code. This isn't necessary but I included it so this example is more clear. (such as int)

• $proceso[$key] = $value = is your value for this iteration of the foreach statement (such as 1)

Output:

$key           $value          $datatype      $dt_str
User_ID        1                       3      int
Email          null                  253      varchar
Name           kim                   253      varchar
Password       null                  253      varchar
FB_ID          null                    3      int
Total_Score    10                      3      int
add_date       2013-11-03 23:04:08    12      datetime