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mysqli_stmt_affected_rows (PHP 5) mysqli_stmt_affected_rows (no version information, might be only in CVS) mysqli_stmt->affected_rows -- Returns the total number of rows changed, deleted, or
inserted by the last executed statement
说明Procedural style : int mysqli_stmt_affected_rows ( mysqli_stmt stmt ) Object oriented style (property): class mysqli_stmt { int affected_rows }
Returns the number of rows affected by INSERT,
UPDATE, or DELETE query.
This function only works with queries which update a table. In order to
get the number of rows from a SELECT query, use
mysqli_stmt_num_rows() instead.
返回值
An integer greater than zero indicates the number of rows affected or
retrieved.
Zero indicates that no records where updated for an UPDATE/DELETE
statement, no rows matched the WHERE clause in the query or that no query
has yet been executed. -1 indicates that the query has returned an error.
注意:
If the number of affected rows is greater than maximal PHP int value, the
number of affected rows will be returned as a string value.
范例例 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();
}
/* create temp table */
$mysqli->query("CREATE TEMPORARY TABLE myCountry LIKE Country");
$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";
/* prepare statement */
if ($stmt = $mysqli->prepare($query)) {
/* Bind variable for placeholder */
$code = 'A%';
$stmt->bind_param("s", $code);
/* execute statement */
$stmt->execute();
printf("rows inserted: %d\n", $stmt->affected_rows);
/* close statement */
$stmt->close();
}
/* close connection */
$mysqli->close();
?> |
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例 2. Procedural style <?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* create temp table */
mysqli_query($link, "CREATE TEMPORARY TABLE myCountry LIKE Country");
$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";
/* prepare statement */
if ($stmt = mysqli_prepare($link, $query)) {
/* Bind variable for placeholder */
$code = 'A%';
mysqli_stmt_bind_param($stmt, "s", $code);
/* execute statement */
mysqli_stmt_execute($stmt);
printf("rows inserted: %d\n", mysqli_stmt_affected_rows($stmt));
/* close statement */
mysqli_stmt_close($stmt);
}
/* close connection */
mysqli_close($link);
?> |
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上例将输出：
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