PHP Dokumentation: Mysqli-stmt num-rows
12. Januar 2010 von werner
mysqli_stmt::num_rows
mysqli_stmt_num_rows
(PHP 5)
mysqli_stmt::num_rows — mysqli_stmt_num_rows — Return the number of rows in statements result set
Beschreibung
Object oriented style (property):
Procedural style :
Returns the number of rows in the result set. The use of mysqli_stmt_num_rows() depends on whether or not you used mysqli_stmt_store_result() to buffer the entire result set in the statement handle.
If you use mysqli_stmt_store_result(), mysqli_stmt_num_rows() may be called immediately.
Parameter-Liste
- stmt
Nur bei prozeduralem Aufruf: ein vonmysqli_stmt_init() zurückgegebensStatementobjekt.
Rückgabewerte
An integer representing the number of rows in result set.
Beispiele
Beispiel #1 Object oriented style
<?php
/* Open a connection */
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}$query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";
if ($stmt = $mysqli->prepare($query)) {
/* execute query */
$stmt->execute();
/* store result */
$stmt->store_result();
printf("Number of rows: %d.\n", $stmt->num_rows);
/* close statement */
$stmt->close();
}/* close connection */
$mysqli->close();
?>Beispiel #2 Procedural style
<?php
/* Open a connection */
$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}$query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";
if ($stmt = mysqli_prepare($link, $query)) {
/* execute query */
mysqli_stmt_execute($stmt);
/* store result */
mysqli_stmt_store_result($stmt);
printf("Number of rows: %d.\n", mysqli_stmt_num_rows($stmt));
/* close statement */
mysqli_stmt_close($stmt);
}/* close connection */
mysqli_close($link);
?>Das oben gezeigte Beispiel erzeugt folgendeAusgabe:
Number of rows: 20.
Siehe auch
- mysqli_stmt_affected_rows() – Returns the total number of rows changed, deleted, or inserted by the last executed statement
- mysqli_prepare() – Prepare a SQL statement for execution
- mysqli_stmt_store_result() – Transfers a result set from a prepared statement
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