PHP Dokumentation: Function maxdb-num-rows
12. Januar 2010 von werner
maxdb_num_rows
(PECL maxdb >= 1.0)
maxdb_num_rows — Gets the number of rows in a result
Beschreibung
Procedural style:
Object oriented style (property):
maxdb
int $num_rows;
Returns the number of rows in the result set.
The use of maxdb_num_rows() depends on whether you use buffered or unbuffered result sets. In case you use unbuffered resultsets maxdb_num_rows() will not correct the correct number of rows until all the rows in the result have been retrieved.
Rückgabewerte
Returns number of rows in the result set.
Hinweis: If the number of rows is greater than maximal int value, the number will be returned as a string.
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();
}if (
$result = $maxdb->query("SELECT cno, name FROM hotel.customer ORDER BY name")) {
/* determine number of rows result set */
$row_cnt = $result->num_rows;
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */
$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();
}if (
$result = maxdb_query($link, "SELECT cno, name FROM hotel.customer ORDER BY name")) {
/* determine number of rows result set */
$row_cnt = maxdb_num_rows($result);
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */
maxdb_free_result($result);
}/* close connection */
maxdb_close($link);
?>Das oben gezeigte Beispiel erzeugteine ähnliche Ausgabe wie:
Result set has 15 rows.
Siehe auch
- maxdb_affected_rows() – Gets the number of affected rows in a previous MaxDB operation
- maxdb_store_result() – Transfers a result set from the last query
- maxdb_use_result() – Initiate a result set retrieval
- maxdb_query() – Performs a query on the database
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