maxdb_fetch_field
(PECL)
maxdb_fetch_field
(no version information, might be only in CVS)
result->fetch_field -- Returns the next field in the result set
Description
Procedural style:
mixed
maxdb_fetch_field ( resource result )
Object oriented style (method):
class
result {
mixed
fetch_field ( void )
}
The maxdb_fetch_field() returns the definition of one column
of a result set as an resource. Call this function repeatedly to retrieve
information about all columns in the result set.
maxdb_fetch_field() returns FALSE when no more fields
are left.
Return values
Returns an resource which contains field definition informations or FALSE if no field information
is available.
表 1. Object properties
Property | Description |
---|
name | The name of the column |
max_length | The maximum width of the field for the result set. |
type | The data type used for this field |
decimals | The number of decimals used (for integer fields) |
Example
例 1. Object oriented style
<?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
$query = "SELECT name, cno from hotel.customer ORDER BY cno";
if ($result = $maxdb->query($query)) {
/* Get field information for all columns */ while ($finfo = $result->fetch_field()) {
printf("Name: %s\n", $finfo->name); printf("Table: %s\n", $finfo->table); printf("max. Len: %d\n", $finfo->max_length); printf("Flags: %d\n", $finfo->flags); printf("Type: %d\n\n", $finfo->type); } $result->close(); }
/* close connection */ $maxdb->close(); ?>
|
|
例 2. Procedural style
<?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
$query = "SELECT name, cno from hotel.customer ORDER BY cno";
if ($result = maxdb_query($link, $query)) {
/* Get field information for all fields */ while ($finfo = maxdb_fetch_field($result)) {
printf("Name: %s\n", $finfo->name); printf("Table: %s\n", $finfo->table); printf("max. Len: %d\n", $finfo->max_length); printf("Flags: %d\n", $finfo->flags); printf("Type: %d\n\n", $finfo->type); } maxdb_free_result($result); }
/* close connection */ maxdb_close($link); ?>
|
|
The above examples would produce the following output:
Name: NAME
Table:
max. Len: 10
Flags: -1
Type: 2
Name: CNO
Table:
max. Len: 4
Flags: -1
Type: 0 |