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mysqli_stmt_store_result (PHP 5) mysqli_stmt_store_result (no version information, might be only in CVS) mysqli_stmt->store_result -- Transfers a result set from a prepared statement DescriptionProcedural style: bool mysqli_stmt_store_result ( mysqli_stmt stmt ) Object oriented style (method): class mysqli_stmt { bool store_result ( void ) }
You must call mysqli_stmt_store_result() for every query that
successfully produces a result set (SELECT, SHOW, DESCRIBE, EXPLAIN),
and only if you want to buffer the complete result set by the client,
so that the subsequent mysqli_stmt_fetch() call returns buffered data.
注:
It is unnecessary to call mysqli_stmt_store_result() for other queries,
but if you do, it will not harm or cause any notable performance in all cases.
You can detect whether the query produced a result set by checking if
mysqli_stmt_result_metadata() returns NULL.
返回值如果成功则返回 TRUE，失败则返回 FALSE。 例例子 1. Object oriented style |
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
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)) {
$stmt->execute();
$stmt->store_result();
printf("Number of rows: %d.\n", $stmt->num_rows);
$stmt->free_result();
$stmt->close();
}
$mysqli->close();
?>
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例子 2. Procedural style |
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
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, $query)) {
mysqli_stmt_execute($stmt);
mysqli_stmt_store_result($stmt);
printf("Number of rows: %d.\n", mysqli_stmt_num_rows($stmt));
mysqli_stmt_free_result($stmt);
mysqli_stmt_close($stmt);
}
mysqli_close($link);
?>
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上例将输出：
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mysqli_stmt_sqlstate