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PHP数组未显示在页面中_Php_Html_Pdo - Fatal编程技术网

PHP数组未显示在页面中

PHP数组未显示在页面中,php,html,pdo,Php,Html,Pdo,注释列表应显示在ul li范围内,是否有任何原因说明它们没有显示,而数组显示在页面顶部 数据库连接似乎工作得很好,但是注释没有显示在范围内。它还删除了“您没有添加任何注释文本” 代码 请随意使用下面的示例进行查询 // Your sql query $sql = "SELECT ID, note FROM notes"; // Prepare your statement $stmt = $db -> prepare($sql); // Execute your

注释列表应显示在ul li范围内,是否有任何原因说明它们没有显示,而数组显示在页面顶部

数据库连接似乎工作得很好,但是注释没有显示在范围内。它还删除了“您没有添加任何注释文本”

代码


请随意使用下面的示例进行查询

// Your sql query
$sql  = "SELECT ID, note FROM notes";

// Prepare your statement
$stmt = $db -> prepare($sql);

// Execute your prepared statement
$stmt -> execute();

// Retreive all rows
$notes = $stmt -> fetchAll();

// Check if array is not empty
if (!empty($notes)) {
    //Spit out the array
    print_r($notes);
}
工作代码

<?php

require_once 'app/init.php';

$notesQuery = $db->prepare("
    SELECT ID, note
    FROM notes
");

$notesQuery->execute();

$notes = $notesQuery->rowCount() ? $notesQuery : [];


?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Notes</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <header>
        <h1>myNotes</h1>
        <nav>
            <a href="index.php">Home</a>
            <a href="about.html">About</a>
            <a href="contact.html">Contact</a>
        </nav>
    </header> 
    <div class="container">
        <form action="add.php" method="post"> 
                <textarea name="note" placeholder="Insert a note..." autocomplete="off" required></textarea>
                <input type="submit" value="Add" />
        </form>
        <div class="notes">
            <h2>Notes</h2>

            <?php if(!empty($notes)): ?>

            <ul>
                <?php foreach($notes as $note): ?>
                    <li>
                        <span><?php echo $note['note']; ?></span>
                    </li>
                <?php endforeach; ?>
            </ul>
                <?php else: ?>
                    <p>you haven't added any notes yet.</p>
                <?php endif; ?>
        </div>
    </div>
</body>
</html>

印制美元钞票;在foreach循环之前。对不起,我要把这个放在哪里?如果我把它放在I receive`PDOStatement Object[queryString]=>SELECT ID,note FROM notes`前面,您已经执行了该语句,但尚未获取行。$notes是什么类型的对象?这是哪个数据库访问库?我很惊讶您可以在查询上运行一个循环,而不调用另一个方法来提取结果?看起来$notes不是数组,更像是查询结果集的迭代器,如果查询返回5行,那么$notes=5,则只能使用onceNo。
<?php

require_once 'app/init.php';

$notesQuery = $db->prepare("
    SELECT ID, note
    FROM notes
");

$notesQuery->execute();

$notes = $notesQuery->rowCount() ? $notesQuery : [];


?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Notes</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <header>
        <h1>myNotes</h1>
        <nav>
            <a href="index.php">Home</a>
            <a href="about.html">About</a>
            <a href="contact.html">Contact</a>
        </nav>
    </header> 
    <div class="container">
        <form action="add.php" method="post"> 
                <textarea name="note" placeholder="Insert a note..." autocomplete="off" required></textarea>
                <input type="submit" value="Add" />
        </form>
        <div class="notes">
            <h2>Notes</h2>

            <?php if(!empty($notes)): ?>

            <ul>
                <?php foreach($notes as $note): ?>
                    <li>
                        <span><?php echo $note['note']; ?></span>
                    </li>
                <?php endforeach; ?>
            </ul>
                <?php else: ?>
                    <p>you haven't added any notes yet.</p>
                <?php endif; ?>
        </div>
    </div>
</body>
</html>