PHP Dokumentation: Mysqli-result field-seek
12. Januar 2010 von werner
mysqli_result::field_seek
mysqli_field_seek
(PHP 5)
mysqli_result::field_seek — mysqli_field_seek — Set result pointer to a specified field offset
Beschreibung
Object oriented style (method):
Procedural style:
Sets the field cursor to the given offset. The next call to mysqli_fetch_field() will retrieve the field definition of the column associated with that offset.
Hinweis: To seek to the beginning of a row, pass an offset value of zero.
Parameter-Liste
- result
Nur bei prozeduralem Aufruf: Ein vonmysqli_query(), mysqli_store_result()oder mysqli_use_result() zurückgegebenesErgebnisobjekt.
- fieldnr
The field number. This value must be in the range from 0 to number of fields – 1.
Rückgabewerte
Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.
Beispiele
Beispiel #1 Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";if (
$result = $mysqli->query($query)) {
/* Get field information for 2nd column */
$result->field_seek(1);
$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 */
$mysqli->close();
?>Beispiel #2 Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";if (
$result = mysqli_query($link, $query)) {
/* Get field information for 2nd column */
mysqli_field_seek($result, 1);
$finfo = mysqli_fetch_field($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", $finfo->type);
mysqli_free_result($result);
}/* close connection */
mysqli_close($link);
?>Das oben gezeigte Beispiel erzeugt folgendeAusgabe:
Name: SurfaceAreaTable: Countrymax. Len: 10Flags: 32769Type: 4
Siehe auch
- mysqli_fetch_field() – Returns the next field in the result set
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