如何获取字段类型和值? [英] How to fetch field type and value?

问题描述

我目前正在尝试使用mysql/php构建表单，下面是到目前为止我拥有的代码的一部分

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

第1块:

$proceso = mysqli_fetch_assoc($result); // my query returns only one row

...

<form action='actualizar.php' method='Post'>
<?php
foreach(array_keys($proceso) as $key){

echo "<label for='$key'>$key: </label>";
echo "<input name='$key' value='".$proceso[$key]."'><br/>";

}
echo "<input type='hidden' name='View' value='$view'>";
?>

<input type="submit" value="Actualizar">
</form>

到目前为止，这是给我的一种表单，其中使用字段名称生成标签和输入框，以显示字段值.我想使用jquery datepicker进一步格式化某些字段，但仅适用于mysql表中类型为Date的那些字段.

This so far is getting me a form where I'm using the field names to generate labels and input boxes where i show the field value. I would like to further format some of the fields using the jquery datepicker, but only for those fields which have a type = Date in the mysql table.

我一直在尝试使用类似以下内容的mysqli_fetch_field_direct:

I've been trying mysqli_fetch_field_direct using something like:

第2块:

$fields = mysqli_num_fields($result);
for ($i=0; $i < $fields; $i++) {
    $field_types[] = $result->fetch_field_direct($i)->type;
}

但是在这种情况下，我无法获取值，仅是类型

but in this case I can't get the value, just the type

是否有一种简单的方法来获取字段的类型和值?

Is there a straightforward way to get the type and value of a field?

编辑为(尝试)以简化操作:

Edited to (try) to simplify:

假设我有一个名为email的字段，该字段的类型= varchar，并且我的SQL查询生成一个结果[e-mail]

Let's say I have a field called email which has type = varchar and my SQL query generates one result [e-mail]

从BLOCK#1我得到:

From BLOCK#1 I get:

     -------------------------------
     Field-Name  | Field-Value
     email       | [e-mail]

从BLOCK#2我得到:

From BLOCK#2 I get:

     -------------------------------
     Field-Name | Field-Type
     email      | varchar

我想要得到的是

     -------------------------------
     Field-Name | Field-Type | Field-Value
     email      | varchar    | [e-mail]

这是因为我想使用字段类型将css类添加到输入框(例如使用datepicker).

This is because I would like to use the field type to add a css class to the input box (such as to use the datepicker).

推荐答案

我将输出放在表中，因为我无法入睡...

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

好吧...看看这是否是您想要的...

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

这是我为另一个SO问题制作的表格:

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)

，并通过数据库:

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)

和代码:

<?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>

所以...以澄清...

So... to clarify...

您可以在foreach中使用这些变量来输出或使用所需的信息:(例如，我将输出的第一行用于user_id)

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是列/字段名称(例如user_id)

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

$field_types[$key]来自$result->fetch_field_direct($i)->type(例如3)

$mysql_data_type_hash[$datatype]是数据类型的字符串版本，使用代码顶部的$mysql_data_type_hash数组.这不是必需的，但我包括了它，因此此示例更加清楚. (例如int)

$mysql_data_type_hash[$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 =是该foreach语句(例如1)

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

输出:

$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

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