問題描述

我正在 PHP 中運行一個腳本，該腳本使用循環(huán)為 MySQL 創(chuàng)建一個字符串查詢.

I am running a script in PHP that uisng a loop creates a string query for MySQL.

執(zhí)行腳本后出現(xiàn)以下錯誤:

After executing the script I get the following error:

您的 SQL 語法有錯誤；請查看手冊對應(yīng)于您的 MySQL 服務(wù)器版本以使用正確的語法'UPDATE BANNERS SET pos=1 WHERE BID=5; 附近更新橫幅集pos=2 WHERE BID=1' 在第 2 行"

"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE BANNERS SET pos=1 WHERE BID=5; UPDATE BANNERS SET pos=2 WHERE BID=1' at line 2"

在錯誤之后我回顯查詢，它看起來像這樣:

right after the error I echo the query and it looks like this:

UPDATE BANNERS SET pos=0 WHERE BID=6;
UPDATE BANNERS SET pos=1 WHERE BID=5;
UPDATE BANNERS SET pos=2 WHERE BID=1;

當(dāng)我將其復(fù)制并粘貼到 phpmyadmin 中時，它顯然可以毫無問題地執(zhí)行.

When I copy and paste it into phpmyadmin, it obviously gets executed without any problem.

有什么想法嗎?

這是PHP代碼:

有一個看起來像這樣的數(shù)組:

There is an array that looks like this:

$order[0] = 'tr_6';
$order[1] = 'tr_5';
$order[2] = 'tr_1';

$query = "";

foreach($order as $pos => $value){
   $idvalue = str_replace('tr_','',$value);
   $query .= "UPDATE BANNERS  SET pos=$pos WHERE BID=$idvalue;
";
}

mysqli_query($connection,$query) or die(mysqli_error($connection)."<br/>$query");

謝謝！

推薦答案

mysqli 允許使用 mysqli_multiple_query 函數(shù)進行多次查詢，如下所示:

mysqli allow multiple queries with mysqli_multiple_query function like this:

$query  = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

/* execute multi query */
if (mysqli_multi_query($link, $query)) {
    do {
        /* store first result set */
        if ($result = mysqli_store_result($link)) {
            while ($row = mysqli_fetch_row($result)) {
                printf("%s
", $row[0]);
            }
            mysqli_free_result($result);
        }
        /* print divider */
        if (mysqli_more_results($link)) {
            printf("-----------------
");
        }
    } while (mysqli_next_result($link));
}

請注意，每次查詢后都需要使用分號.

note that you need to use semicolon after each query.

這篇關(guān)于Mysqli 不允許多個查詢?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！