PHP mysql_fetch_field() Function
 Complete PHP MySQL Reference
Definition and Usage
The mysql_fetch_field() function returns an object containing information of
a field from a recordset.
This function gets field data from the mysql_query() function and returns an
object on success, or FALSE on failure or
when there are no more
rows.
Possible return values:
- name - Field name
- table - The table the field belongs to
- def - Default value for the field
- max_length - Maximum field length
- not_null - 1 if the field cannot be NULL
- primary_key - 1 if the field is a primary key
- unique_key - 1 if the field is a unique key
- multiple_key - 1 if the field is a non-unique key
- numeric - 1 if the field is numeric
- blob - 1 if the field is a BLOB
- type - Field type
- unsigned - 1 if the field is unsigned
- zerofill - 1 if the field is zero-filled
Syntax
mysql_fetch_field(data,field_offset)
|
| Parameter |
Description |
| data |
Required. Specifies which data pointer to use. The data
pointer is the result from the mysql_query() function |
| field_offset |
Optional. Specifies which field to start returning.
0 indicates the first field. If this parameter is not set, it
will retrieve the next field |
Tips and Notes
Note: Each subsequent call to mysql_fetch_field() returns the next
field in the recordset.
Example
<?php
$con = mysql_connect("localhost", "peter", "abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db("test_db",$con);
$sql = "SELECT * from Person";
$result = mysql_query($sql,$con);
while ($property = mysql_fetch_field($result))
{
echo "Field name: " . $property->name . "<br />";
echo "Table name: " . $property->table . "<br />";
echo "Default value: " . $property->def . "<br />";
echo "Max length: " . $property->max_length . "<br />";
echo "Not NULL: " . $property->not_null . "<br />";
echo "Primary Key: " . $property->primary_key . "<br />";
echo "Unique Key: " . $property->unique_key . "<br />";
echo "Mutliple Key: " . $property->multiple_key . "<br />";
echo "Numeric Field: " . $property->numeric . "<br />";
echo "BLOB: " . $property->blob . "<br />";
echo "Field Type: " . $property->type . "<br />";
echo "Unsigned: " . $property->unsigned . "<br />";
echo "Zero-filled: " . $property->zerofill . "<br /><br />";
}
mysql_close($con);
?>
|
The output of the code above could be:
Field name: LastName
Table name: Person
Default value:
Max length: 8
Not NULL: 0
Primary Key: 0
Unique Key: 0
Mutliple Key: 0
Numeric Field: 0
BLOB: 0
Field Type: string
Unsigned: 0
Zero-filled: 0
Field name: FirstName
Table name: Person
Default value:
Max length: 7
Not NULL: 0
Primary Key: 0
Unique Key: 0
Mutliple Key: 0
Numeric Field: 0
BLOB: 0
Field Type: string
Unsigned: 0
Zero-filled: 0
Field name: Address
Table name: Person
Default value:
Max length: 9
Not NULL: 0
Primary Key: 0
Unique Key: 0
Mutliple Key: 0
Numeric Field: 0
BLOB: 0
Field Type: string
Unsigned: 0
Zero-filled: 0
Field name: Age
Table name: Person
Default value:
Max length: 2
Not NULL: 0
Primary Key: 0
Unique Key: 0
Mutliple Key: 0
Numeric Field: 1
BLOB: 0
Field Type: int
Unsigned: 0
Zero-filled: 0
|
Complete PHP MySQL Reference
 |
 |
 |
 |
|
The Ektron Intranet
lets you do everything you need to do on your corporate intranet and everything you want to do... all with just one application.
What can you do with the Ektron Intranet? |
 |
Navigate through content, documents, assets, colleagues and workgroups quickly and intuitively with enterprise search |
 |
Communicate with friends and colleagues with forums, message boards and corporate blogging using the new Social Networking Platform |
|
Utilize the extensive out-of-the box features or customize your site through Ektron CMS400.NET's open architecture |
 |
Promote collaboration in your organization through project workspaces where others can efficiently find information and work together |
 |
Author/edit content, manage navigation, menus, audit trails, workflow and approvals with the best in breed Content Management |
|
|
|
|
See why there are 20,000+ Ektron integrations worldwide.
|
|
 |
TAKE THE VIDEO TOUR |
 |
or download a FREE TRIAL today. |
|
HOME
Printer friendly page
