mysqli_result::fetch_rowmysqli_result::field_count
mysqli_num_fields
(PHP 5)
mysqli_result::field_count -- mysqli_num_fields — Get the number of fields in a result
Beschreibung
Objektorientierter Stil
int $mysqli_result->field_count;
Prozeduraler Stil
int mysqli_num_fields
( mysqli_result $result
)
Returns the number of fields from specified result set.
Parameter-Liste
- result
-
Nur bei prozeduralem Aufruf: Ein von mysqli_query(), mysqli_store_result() oder mysqli_use_result() zurückgegebenes Ergebnisobjekt.
Rückgabewerte
The number of fields from a result set.
Beispiele
Beispiel #1 Objektorientierter Stil
<?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 Prozeduraler Stil
<?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);
?>
Die obigen Bespiele erzeugen folgende Ausgabe:
Result set has 5 fields.
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mysqli_result::field_count
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