PHP Dokumentation: Function maxdb-fetch-field-direct
12. Januar 2010 von werner
maxdb_fetch_field_direct
result->fetch_field_direct
(PECL maxdb >= 1.0)
maxdb_fetch_field_direct — result->fetch_field_direct — Fetch meta-data for a single field
Beschreibung
Procedural style:
Object oriented style (method):
result
mixed fetch_field_direct ( int $fieldnr )
maxdb_fetch_field_direct() returns an resource which contains field definition information from specified resultset. The value of fieldnr must be in the range from 0 to number of fields – 1.
Rückgabewerte
Returns an resource which contains field definition information or FALSE if no field information for specified fieldnr is available.
| Attribute | 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) |
Beispiele
Beispiel #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 name";if (
$result = $maxdb->query($query)) {
/* Get field information for column 'SurfaceArea' */
$finfo = $result->fetch_field_direct(1);
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", $finfo->type);
$result->close();
}/* close connection */
$maxdb->close();
?>Beispiel #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 name";if (
$result = maxdb_query($link, $query)) {
/* Get field information for column 'cno' */
$finfo = maxdb_fetch_field_direct($result, 1);
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", $finfo->type);
maxdb_free_result($result);
}/* close connection */
maxdb_close($link);
?>Das oben gezeigte Beispiel erzeugteine ähnliche Ausgabe wie:
Name: CNOTable:max. Len: 4Flags: -1Type: 0
Siehe auch
- maxdb_num_fields() – Get the number of fields in a result
- maxdb_fetch_field() – Returns the next field in the result set
- maxdb_fetch_fields() – Returns an array of resources representing the fields in a result set
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