Question

我一直跑进一个空白页面！每当我尝试访问该网站时，它都是空白的！这应该是一个简单的SQL检索页面（https://www.youtube.com/watch?v=IYmS5HRo6JI），但它只是不起作用。有什么想法吗？

<html>
<head>
    <title>Search</title>
    <style type="text/css">
        table {
            background-color: #FCF;
        }

        th {
            width: 150px;
            text-align: left;
        }
    </style>
</head>

<body>
<h1>Search</h1>


<form method="post" action="search.php">
    <input type="hidden" name="submitted" value="true"/>

    <label> Search | Category:
        <select name="category">
            <option value="name">Name</option>
            <option value="date">Date</option>
        </select>
    </label>

    <label>Search Criteria: <input type="text" name="criteria"/></label>
    <input type="submit"/>
</form>

<?php

if (isset($_POST['submitted'])) {

    // connect to DB
    include('connect.php');

    $category = $_POST['category'];
    $criteria = $_POST['criteria'];
    $query = "SELECT * FROM calls WHERE $category = '$category'";
    $result = mysqli_query($dbcon, $query) or die ('Error');


    echo "<table>";
    echo "<tr> <th>Date</th> <th>Name</th>";
}

while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    echo "<tr><td>";
    echo $row ['date'];
    echo "<tr><td>";
    echo $row ['name'];
}

?>
</body>
</html>

Answer 1

我完全删除了

<style...

从头部开始显示。

以下是我使用的正确显示的完整代码：

<html>
<head>
<title>Search</title>
</head>

<body>
<h1>Search</h1>


<form method="post" action="search.php">
<input type="hidden" name="submitted" value="true" />

<label> Search | Category:
<select name="category">
<option value="name">Name</option>
<option value="date">Date</option>
</select>
</label>

<label>Search Criteria: <input type="text" name="criteria" /></label>
<input type="submit" />
</form>
</body>
</html>

Answer 2

这应该有效。仔细看看* mysqli_num_rows *。

<html>
<head>
    <title>Search</title>
    <style type="text/css">
        table {
            background-color: #FCF;
        }

        th {
            width: 150px;
            text-align: left;
        }
    </style>
</head>

<body>
<h1>Search</h1>


<form method="post" action="search.php">
    <input type="hidden" name="submitted" value="true"/>

    <label> Search | Category:
        <select name="category">
            <option value="name">Name</option>
            <option value="date">Date</option>
        </select>
    </label>

    <label>Search Criteria: <input type="text" name="criteria"/></label>
    <input type="submit"/>
</form>

<?php

if (isset($_POST['submitted'])) {

    // connect to DB
    include('connect.php');

    $category = $_POST['category'];
    $criteria = $_POST['criteria'];
    $query = "SELECT * FROM calls WHERE $category = '$category'";
    $result = mysqli_query($dbcon, $query) or die ('Error');


    echo "<table>";
        echo "<thead>";
            echo "<tr>";
                echo "<th>Date</th>";
                echo "<th>Name</th>";
            echo "</tr>";
        echo "</thead>";
        echo "<tbody>";
            if (mysqli_num_rows($result)) {
                while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
                    echo "<tr>";
                        echo "<th>" . $row['date'] . "</th>";
                        echo "<th>" . $row['name'] . "</th>";
                    echo "</tr>";
                }
            }
        echo "</tbody>";
    echo "</table>";
}
?>
</body>
</html>

我执行它时，PHP / HTML站点显示EMPTY。没有错误，只是空的

2 个答案: