MySQL无法识别我的HTML表单选择值

时间：2018-02-05 07:37:13

标签： mysql forms pdo

好吧，我已经四处走动，但是我很难过。我是PDO的初学者，但是我已经狂热地研究了几天而没有运气。

我尝试的是一个过滤器（在这种情况下是扬声器名称）。在我的SELECT语句中，没有WHERE过滤器，一切都显示正常;所有的音频文件+来自测试数据库的信息就像我想要的那样出现。如果我从数据库中插入带有实际发言人姓名的WHERE语句，那将按预期工作，即仅显示该发言者的音频。但是我从选定的表单数据中动态地使WHERE语句动态化是不成功的。

正如你所看到的，代码有点混乱，因为我已经尝试了很多不同的方式，包括（如你所见）声明中的发布值，以及尝试使用绑定值（例如：speaker_name）或更一般的变量。我此时没有生成错误，但我也没有显示过滤结果。基本上看起来剧本根本没有看到表格结果，但我无法弄清楚原因。

    <?php

    include './config2.php';
$speaker = isset($_POST['speaker_name']) ? $_POST['speaker_name'] : false;
    try {
    $dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username,
        $password);
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $speaker  = ( ! empty($_POST['speaker_name']) ? $_POST['speaker_name'] : '');

        if ( isset($_POST['speaker_name'])) {
            $speaker = $_POST['speaker_name'];
        }
        $results = $dbh->prepare("SELECT * FROM sermons WHERE speaker_name = '".$_post['speaker_name']."' ");

    $results->bindValue(':speaker', $_POST['speaker_name'], PDO::PARAM_STR);
    $results->execute();

        for($i=0; $row = $results->fetch(); $i++){

?>
    <div class="sermon-box">
            <h3 class="sermon-title"><?php echo $row['title']; ?></h3>
            <p class="date-detail"><?php echo date("F j, Y", strtotime($row['date_preached'])); ?></p>
            <p class="text-detail"><?php $str = $row['text_book']; $str = substr($str, 3); echo $str; ?> <?php echo $row['text_reference']; ?></p>         
            <p class="speaker">Preacher: <?php echo $row['speaker_name']; ?></p>
            <audio controls>
                <source src="/files/<?php echo $row['file_name']; ?>" type="audio/mpeg">
            </audio>
            <p class="download"><a href="/files/download.php?file=<?php echo $row['file_name']; ?>">&#9660; Download MP3 <span>(<?php echo human_filesize($row['file_size']); ?> MB)</span></a></p>
        <?php 
        }
    }
    catch(PDOException $e) 
    {
        echo "Error: " . $e->getMessage();
    }
    $dbh = null;

        ?>
        </div><!-- end sermon-box -->

这是形式本身：

    <?php
        include './config.php';
        ?>
        <form action="sermon-search-action4.php" method="post">
        <?php 
        $smt = $dbh->prepare('SELECT DISTINCT speaker_name FROM sermons ORDER BY SUBSTRING_INDEX(speaker_name, " ", -1)');
    $smt->execute();
    $data = $smt->fetchAll();
        ?>
<label for="speaker">Speaker</label><select name="speaker" id="speaker" autocomplete="off">
    <?php foreach ($data as $row): ?>
        <option name="<?php echo $row["speaker_name"]?>" value="<?php echo $row["speaker_name"]?>"><?php echo $row["speaker_name"]?></option>
        <?php endforeach ?>
        </select>
<input type="submit" value="Go!">
</form>

2 个答案:

答案 0 :(得分：0)

   <?php

    include './config2.php';
$speaker = isset($_POST['speaker_name']) ? $_POST['speaker_name'] : false;
    try {
    $dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username,
        $password);
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $speaker  = ( ! empty($_POST['speaker_name']) ? $_POST['speaker_name'] : '');

        if ( isset($_POST['speaker_name'])) {
            $speaker = $_POST['speaker_name'];
        }
        $results = $dbh->prepare("SELECT * FROM sermons WHERE speaker_name = '".$_post['speaker_name']."' ");

    $results->bindValue(':speaker', $_POST['speaker_name'], PDO::PARAM_STR);
    $results->execute();

        for($i=0; $row = $results->fetch(); $i++){

?>
    <div class="sermon-box">
            <h3 class="sermon-title"><?php echo $row[$i]['title']; ?></h3>
            <p class="date-detail"><?php echo date("F j, Y", strtotime($row[$i]['date_preached'])); ?></p>
            <p class="text-detail"><?php $str = $row[$i]['text_book']; $str = substr($str, 3); echo $str; ?> <?php echo $row[$i]['text_reference']; ?></p>         
            <p class="speaker">Preacher: <?php echo $row[$i]['speaker_name']; ?></p>
            <audio controls>
                <source src="/files/<?php echo $row[$i]['file_name']; ?>" type="audio/mpeg">
            </audio>
            <p class="download"><a href="/files/download.php?file=<?php echo $row[$i]['file_name']; ?>">&#9660; Download MP3 <span>(<?php echo human_filesize($row[$i]['file_size']); ?> MB)</span></a></p>
        <?php 
        }
    }
    catch(PDOException $e) 
    {
        echo "Error: " . $e->getMessage();
    }
    $dbh = null;

        ?>
        </div><!-- end sermon-box -->

您应该使用$ data [＆＃39; speaker_name＆＃39;]

而不是使用$ row [＆＃39; speaker_name＆＃39;] 
  <?php
        include './config.php';
        ?>
        <form action="sermon-search-action4.php" method="post">
        <?php 
        $smt = $dbh->prepare('SELECT DISTINCT speaker_name FROM sermons ORDER BY SUBSTRING_INDEX(speaker_name, " ", -1)');
    $smt->execute();
    $data = $smt->fetchAll();
        ?>
<label for="speaker">Speaker</label><select name="speaker" id="speaker" autocomplete="off">
    <?php foreach ($data as $row): ?>
        <option name="<?php echo $data["speaker_name"]?>" value="<?php echo $data["speaker_name"]?>"><?php echo $data["speaker_name"]?></option>
        <?php endforeach ?>
        </select>
<input type="submit" value="Go!">
</form>

答案 1 :(得分：0)

我已经完成了。

扬声器Display.php的：

    <?php
include './config2.php';
$speaker_name = isset($_POST['speaker_name']) ? $_POST['speaker_name'] : false;
    try {
    $dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username,
        $password);
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $speaker_name  = ( ! empty($_POST['speaker_name']) ? $_POST['speaker_name'] : '');

        if ( isset($_POST['speaker_name'])) {
            $speaker = $_POST['speaker_name'];
        }
        $results = $dbh->prepare("SELECT * FROM sermons WHERE speaker_name = ?");
        $results->execute(array($speaker_name));
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Sermon Search</title>
<meta name="description" content="">
<link href="/screen.css" rel="stylesheet" media="screen">
<!--[if lt IE 9]>
<script src="/dist/html5shiv.js"></script>
<![endif]-->
<!--[if lte IE 9]>
<link href="/_ie9.css" rel="stylesheet" type="text/css" media="screen" />
<![endif]-->
<meta name=viewport content="width=device-width, initial-scale=1">
<link rel="icon" href="/favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
</head>

<body class="churchuse">
<?php   for($i=0; $row = $results->fetch(); $i++){

        $found_rows = true;
 ?>
    <div class="sermon-box">
            <h3 class="sermon-title"><?php echo $row['title']; ?></h3>
            <p class="date-detail"><?php echo date("F j, Y", strtotime($row['date_preached'])); ?></p>
            <p class="text-detail"><?php $str = $row['text_book']; $str = substr($str, 3); echo $str; ?> <?php echo $row['text_reference']; ?></p>         
            <p class="content-detail">Keywords: <?php echo $row['keywords']; ?></p>
            <p class="speaker">Preacher: <?php echo $row['speaker_name']; ?></p>
            <audio controls>
                <source src="/files/<?php echo $row['file_name']; ?>" type="audio/mpeg">
            </audio>
            <p class="download"><a href="/files/download.php?file=<?php echo $row['file_name']; ?>">&#9660; Download MP3 <span>(<?php echo human_filesize($row['file_size']); ?> MB)</span></a></p>
    </div><!-- end sermon-box -->
        <?php 
        }
        if (!isset($found_rows)) echo "Sorry, no sermons found for this book.";
    }
    catch(PDOException $e) 
    {
        echo "Error: " . $e->getMessage();
    }
    $dbh = null;

        ?>

 </body>

搜索框：

    <div class="searchbox">
<?php
        include './config.php';
        ?>
        <form action="speaker-display.php" method="post">
        <?php 
        $smt = $dbh->prepare('SELECT DISTINCT speaker_name FROM sermons ORDER BY SUBSTRING_INDEX(speaker_name, " ", -1)');
    $smt->execute();
    $data = $smt->fetchAll(PDO::FETCH_ASSOC);

        ?>
<label for="text_book">Search by Speaker</label><select name="speaker_name" id="speaker_name" autocomplete="off">
    <?php foreach ($data as $row): ?>
        <option name="<?php echo $row['speaker_name']?>" value="<?php echo $row['speaker_name']?>"><?php echo $row['speaker_name']?></option>
        <?php endforeach; ?>
        </select>
<input type="submit" value="Go!">
</form>
</div><!-- end search box -->
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