PHP Dokumentation: Mysqli-result field-count
12. Januar 2010 von werner
mysqli_result->field_count
mysqli_num_fields
(PHP 5)
mysqli_result->field_count — mysqli_num_fields — Get the number of fields in a result
Beschreibung
Object oriented style (property):
int $field_count;
Procedural style:
int mysqli_num_fields ( mysqli_result $result )
Returns the number of fields from specified result set.
Parameter-Liste
- result
Nur bei prozeduralem Aufruf: Ein vonmysqli_query(), mysqli_store_result()oder mysqli_use_result() zurückgegebenesErgebnisobjekt.
Rückgabewerte
The number of fields from a result set.
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();
}if (
$result = $mysqli->query("SELECT * FROM City ORDER BY ID LIMIT 1")) {
/* determine number of fields in result set */
$field_cnt = $result->field_count;
printf("Result set has %d fields.\n", $field_cnt);
/* close result set */
$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();
}if (
$result = mysqli_query($link, "SELECT * FROM City ORDER BY ID LIMIT 1")) {
/* determine number of fields in result set */
$field_cnt = mysqli_num_fields($result);
printf("Result set has %d fields.\n", $field_cnt);
/* close result set */
mysqli_free_result($result);
}/* close connection */
mysqli_close($link);
?>Das oben gezeigte Beispiel erzeugt folgendeAusgabe:
Result set has 5 fields.
Siehe auch
- mysqli_fetch_field() – Returns the next field in the result set
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