mysql_fetch_field

(PHP 3, PHP 4 )

mysql_fetch_field -- Get column information from a result and return as an object

Description

object mysql_fetch_field ( resource result [, int field_offset])

Returns an object containing field information.

mysql_fetch_field() can be used in order to obtain information about fields in a certain query result. If the field offset isn't specified, the next field that wasn't yet retrieved by mysql_fetch_field() is retrieved.

The properties of the object are:



範例 1. mysql_fetch_field()

 ?php
mysql_connect('localhost:3306', $user, $password)
    or die("Could not connect: " . mysql_error());
mysql_select_db("database");
$result = mysql_query("select * from table")
    or die("Query failed: " . mysql_error());
/* get column metadata */
$i = 0;
while ($i   mysql_num_fields($result)) {
    echo "Information for column $i: br / \n";
    $meta = mysql_fetch_field($result);
    if (!$meta) {
        echo "No information available br / \n";
    }
    echo " pre 
blob:         $meta- blob
max_length:   $meta- max_length
multiple_key: $meta- multiple_key
name:         $meta- name
not_null:     $meta- not_null
numeric:      $meta- numeric
primary_key:  $meta- primary_key
table:        $meta- table
type:         $meta- type
unique_key:   $meta- unique_key
unsigned:     $meta- unsigned
zerofill:     $meta- zerofill
 /pre ";
    $i++;
}
mysql_free_result($result);
? 

See also mysql_field_seek().