php - 将旧的 sql 代码替换为 pdo 后出现多个错误

标签 php mysql pdo

以下是我的sql代码

<?php
include 'config.php';
$user_ip = $_SERVER['REMOTE_ADDR'];
$pageID = '33'; // The ID of the page, the article or the video ...

//function to calculate the percent
function percent($num_amount, $num_total) {
    $count1 = $num_amount / $num_total;
    $count2 = $count1 * 100;
    $count = number_format($count2, 0);
    return $count;
}

// check if the user has already clicked on the unlike (rate = 2) or the like (rate = 1)
$dislike_sql = mysql_query('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = "'.$user_ip.'" and id_item = "'.$pageID.'" and rate = 2 ');
$dislike_count = mysql_result($dislike_sql, 0);

$like_sql = mysql_query('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = "'.$user_ip.'" and id_item = "'.$pageID.'" and rate = 1 ');
$like_count = mysql_result($like_sql, 0);

// count all the rate 
$rate_all_count = mysql_query('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'"');
$rate_all_count = mysql_result($rate_all_count, 0);

$rate_like_count = mysql_query('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'" and rate = 1');
$rate_like_count = mysql_result($rate_like_count, 0);
$rate_like_percent = percent($rate_like_count, $rate_all_count);

$rate_dislike_count = mysql_query('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'" and rate = 2');
$rate_dislike_count = mysql_result($rate_dislike_count, 0);
$rate_dislike_percent = percent($rate_dislike_count, $rate_all_count);
?>

我试图用下面的代码替换这段代码，但出现了多个错误

<?php
include 'config.php';
$user_ip = $_SERVER['REMOTE_ADDR'];
$pageID = '33'; // The ID of the page, the article or the video ...
//function to calculate the percent
function percent($num_amount, $num_total) {
    $count1 = $num_amount / $num_total;
    $count2 = $count1 * 100;
    $count = number_format($count2, 0);
    return $count;
}
// check if the user has already clicked on the unlike (rate = 2) or the like (rate = 1)
$dislike_sql = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = "'.$user_ip.'" and id_item = "'.$pageID.'" and rate = 2 ');
$dislike_count = $db->query($dislike_sql, 0);
$like_sql = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = "'.$user_ip.'" and id_item = "'.$pageID.'" and rate = 1 ');
$like_count = $db->query($like_sql, 0);
// count all the rate 
$rate_all_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'"');
$rate_all_count = $db->query($rate_all_count, 0);
$rate_like_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'" and rate = 1');
$rate_like_count = $db->query($rate_like_count, 0);
$rate_like_percent = percent($rate_like_count, $rate_all_count);
$rate_dislike_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item = "'.$pageID.'" and rate = 2');
$rate_dislike_count = $db->query($rate_dislike_count, 0);
$rate_dislike_percent = percent($rate_dislike_count, $rate_all_count);
?>

我的代码中出现错误 警告:PDO::query() 期望参数 1 为字符串，第 32、34、37、39 行给出的对象

编辑代码

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>WebCodo :: Like & Dislike System With jQuery Ajax and PHP</title>
        <link type="text/css" rel="stylesheet" href="css/style.css">
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
    </head>
    <body>
        <div class="webcodo-top" >
            <a href="http://webcodo.com/like-dislike-system-with-jquery-ajax-and-php-youtube-like-design">
                <div class="wcd wcd-tuto"> < Come back to the tuto page</div>
            </a>
            <a href="http://webcodo.com">
                <div class="wcd wcd-logo">WEBCODO</div>
            </a>
            <div class="wcd"></div>
        </div>
        <?php
        include 'config.php';
        $user_ip = $_SERVER['REMOTE_ADDR'];
        $pageID = '33'; // The ID of the page, the article or the video ...
        //function to calculate the percent

        function percent($num_amount, $num_total) {
            $count1 = $num_amount / $num_total;
            $count2 = $count1 * 100;
            $count = number_format($count2, 0);
            return $count;
        }

        // check if the user has already clicked on the unlike (rate = 2) or the like (rate = 1)
        $dislike_stmt = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = :user_ip and id_item = :item_id and rate = 2;');
        $dislike_stmt->execute(array(':user_ip' => $user_ip, ':item_id' => $pageID));
        $dislike_count = $dislike_stmt->fetchColumn();

        $like_sql = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip =:user_ip and id_item =:item_id and rate = 1 ');
        $like_sql->execute(array(':user_ip' => $user_ip, ':item_id' => $pageID));
        $like_count = $like_sql->fetchColumn();

        // count all the rate 

        $rate_all_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item =:item_id');
        $rate_all_count->execute(array(':item_id' => $pageID));
        $rate_all_count = $rate_all_count->fetchColumn();

        $rate_like_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item =:item_id and rate = 1');
        $rate_like_count->execute(array(':item_id' => $pageID));
        $rate_like_percent = $rate_like_count->fetchColumn();

        $rate_dislike_count = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE id_item =:item_id and rate = 2');
        $rate_dislike_count->execute(array(':item_id' => $pageID));
        $rate_dislike_percent = $rate_dislike_count->fetchColumn();

        $rate_dislike_percent = percent($rate_dislike_count, $rate_all_count);
        ?>

        <script>
            $(function () {
                var pageID = <?php echo $pageID; ?>;

                $('.like-btn').click(function () {
                    $('.dislike-btn').removeClass('dislike-h');
                    $(this).addClass('like-h');
                    $.ajax({
                        type: "POST",
                        url: "ajax.php",
                        data: 'act=like&pageID=' + pageID,
                        success: function () {
                        }
                    });
                });
                $('.dislike-btn').click(function () {
                    $('.like-btn').removeClass('like-h');
                    $(this).addClass('dislike-h');
                    $.ajax({
                        type: "POST",
                        url: "ajax.php",
                        data: 'act=dislike&pageID=' + pageID,
                        success: function () {
                        }
                    });
                });
                $('.share-btn').click(function () {
                    $('.share-cnt').toggle();
                });
            });
        </script>
        <div class="tab-cnt">
            <h1>Youtube Like & Dislike System With PHP, jQuery & Ajax</h1>
            <div class="tab-tr" id="t1">
                <div class="like-btn <?php
                if ($like_count == 1) {
                    echo 'like-h';
                }
                ?>">Like</div>
                <div class="dislike-btn <?php
                if ($dislike_count == 1) {
                    echo 'dislike-h';
                }
                ?>"></div>

                <div class="share-btn">Share</div>
                <div class="stat-cnt">
                    <div class="rate-count"><?php echo $rate_all_count; ?></div>
                    <div class="stat-bar">
                        <div class="bg-green" style="width:<?php echo $rate_like_percent; ?>%;"></div>
                        <div class="bg-red" style="width:<?php echo $rate_dislike_percent; ?>%"></div>
                    </div><!-- stat-bar -->
                    <div class="dislike-count"><?php echo $rate_dislike_count; ?></div>
                    <div class="like-count"><?php echo $rate_like_count; ?></div>
                </div><!-- /stat-cnt -->
            </div><!-- /tab-tr -->
            <div class="share-cnt">
                <!-- AddThis Button BEGIN -->
                <div class="addthis_toolbox addthis_default_style ">
                    <a class="addthis_button_linkedin_counter"></a>
                    <a class="addthis_button_facebook_like" fb:like:layout="button_count"></a>
                    <a class="addthis_button_tweet"></a>
                    <a class="addthis_button_google_plusone" g:plusone:size="medium"></a> 
                    <a class="addthis_button_pinterest_pinit"></a>
                    <a class="addthis_counter addthis_pill_style"></a>
                </div>
            </div><!-- /share-cnt -->
        </div><!-- /tuto-cnt -->
    </body>
</html>

在上面的编辑之后我得到以下错误

Notice: Object of class PDOStatement could not be converted to int in C:\Users\sanoj\Documents\NetBeansProjects\like youtube\index.php on line 26
Call Stack
#   Time    Memory  Function    Location
1   0.0020  254504  {main}( )   ..\index.php:0
2   0.0260  291496  percent( )  ..\index.php:50

( ! ) Warning: Division by zero in C:\Users\sanoj\Documents\NetBeansProjects\like youtube\index.php on line 26
Call Stack
#   Time    Memory  Function    Location
1   0.0020  254504  {main}( )   ..\index.php:0
2   0.0260  291496  percent( )  ..\index.php:50

( ! ) Notice: Object of class PDOStatement could not be converted to int in C:\Users\sanoj\Documents\NetBeansProjects\like youtube\index.php on line 26
Call Stack
#   Time    Memory  Function    Location
1   0.0020  254504  {main}( )   ..\index.php:0
2   0.0370  295088  percent( )  ..\index.php:55

( ! ) Warning: Division by zero in C:\Users\sanoj\Documents\NetBeansProjects\like youtube\index.php on line 26
Call Stack
#   Time    Memory  Function    Location
1   0.0020  254504  {main}( )   ..\index.php:0
2   0.0370  295088  percent( )  ..\index.php:55

最佳答案

使用准备好的语句与使用普通 SQL 查询不同。请引用PHP documentation对这个。有很好的例子说明如何使用准备好的语句和绑定(bind)参数。例如，检索不喜欢计数应该如下所示:

$dislike_stmt = $db->prepare('SELECT COUNT(*) FROM  wcd_yt_rate WHERE ip = :user_ip and id_item = :item_id and rate = 2;');
$dislike_stmt->execute(array(':user_ip' => $user_ip, ':item_id' => $pageID));
$dislike_count = $dislike_stmt->fetchColumn();

使用绑定(bind)参数还可以让您避免 SQL 注入(inject)威胁。

关于php - 将旧的 sql 代码替换为 pdo 后出现多个错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35970125/

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