mysqli_stmt_num_rows
(PHP 5)
mysqli_stmt_num_rows
(no version information, might be only in CVS)
stmt->num_rows -- Return the number of rows in statements result set
Description
Procedural style :
int
mysqli_stmt_num_rows ( mysqli_stmt stmt )
Object oriented style (property):
class
mysqli_stmt {
int num_rows
}
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.
返回值
An integer representing the number of rows in result set.
范例
例子 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();
?>
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例子 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);
?>
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上例将输出：