我在通过mysqli执行准备好的语句时遇到问题。

首先，我正在使Command出现同步错误。我正在存储结果并关闭连接，并且我已经停止获取此错误，因此希望该问题已停止。

但是，我的sql语法错误中的错误又出现了，该错误在命令不同步时可以正常工作。这是我当前的代码：

我已经尝试了许多不同的方法来纠正此snytax错误，从使用CONCAT（由于失败而被注释掉）到在绑定之前为变量分配％符号等，都没有用。

尝试使用：

$numRecords->bind_param("s",  "%".$brand."%");

导致通过引用传递错误。

<?php
$con = mysqli_connect("localhost", "blah", "blah", "blah");
if (!$con) {
    echo "Can't connect to MySQL Server. Errorcode: %s\n". mysqli_connect_error();
    exit;
}
$con->query("SET NAMES 'utf8'");
$brand = "o";
$brand = "% ".$brand." %";
echo "\n".$brand;
$countQuery = "SELECT ARTICLE_NO FROM AUCTIONS WHERE upper(ARTICLE_NAME) LIKE ?";
//CONCAT('%', ?, '%')";
echo "\ntest";
if ($numRecords = $con->prepare($countQuery)) {
    $numRecords->bind_param("s",  $brand);
    echo "\ntest bind";
    $numRecords->execute();
    echo "\ntest exec";
    $numRecords->store_result();
    $data = $con->query($countQuery) or die(print_r($con->error));
    $rowcount = $data->num_rows;
    $numRecords->free_result();
    $numRecords->close();
    echo "/ntest before rows";
    $rows = getRowsByArticleSearch("test", "Auctions", " ");
    $last = ceil($rowcount/$page_rows);
} else {
    print_r($con->error);
}
foreach ($rows as $row) {
    $pk = $row['ARTICLE_NO'];
    echo '<tr>' . "\n";
    echo '<td><a href="#" onclick="updateByPk(\'Layer2\', \'' . $pk . '\')">'.$row['USERNAME'].'</a></td>' . "\n";
    echo '<td><a href="#" onclick="updateByPk(\'Layer2\', \'' . $pk . '\')">'.$row['shortDate'].'</a></td>' . "\n";
    echo '<td><a href="#" onclick="deleterec(\'Layer2\', \'' . $pk . '\')">DELETE RECORD</a></td>' . "\n";
    echo '</tr>' . "\n";
}
function getRowsByArticleSearch($searchString, $table, $max) {
    $con = mysqli_connect("localhost", "blah", "blah", "blah");
    //global $con;
    $recordsQuery = "SELECT ARTICLE_NO, USERNAME, ACCESSSTARTS, ARTICLE_NAME, date_format(str_to_date(ACCESSSTARTS, '%d/%m/%Y %k:%i:%s'), '%d %m %Y' ) AS shortDate FROM $table WHERE upper(ARTICLE_NAME) LIKE '%?%' ORDER BY str_to_date(ACCESSSTARTS, '%d/%m/%Y %k:%i:%s')" . $max;
    if ($getRecords = $con->prepare($recordsQuery)) {
        $getRecords->bind_param("s", $searchString);
        $getRecords->execute();
        $getRecords->bind_result($ARTICLE_NO, $USERNAME, $ACCESSSTARTS, $ARTICLE_NAME, $shortDate);
        while ($getRecords->fetch()) {
            $result = $con->query($recordsQuery);
            $rows = array();
            while($row = $result->fetch_assoc()) {
                $rows[] = $row;
            }
            return $rows;
        }
    }
}

确切的错误是：

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 '?' at line 11

第11行是定义$ countQuery的行。

如您所见，品牌被赋予“ o”；

因此，SQL语句应为

SELECT ARTICLE_NO FROM AUCTIONS WHERE upper(ARTICLE_NAME) LIKE %o%;

当我手动将其插入时，效果很好。