Question

好的，所以我有一个连接到数据库的小字典程序。用户可以向数据库添加单词，删除单词，以及（在完美世界中）搜索所有现有单词并查看他们在屏幕上查找的定义。最后一点是问题。我不知道如何搜索我的数据库中的所有现有单词，并将我正在寻找的单词放在/home/<username>之上。如何显示搜索结果？

以下是代码：

inputs

Answer 1

if(isset($_POST['search'])){
    $mysqli = //here is where my database connection info would go
    $command = "SELECT *FROM users WHERE `word`='{$mysqli->real_escape_string($_POST['search'])}' or `def`= '{$mysqli->real_escape_string($_POST['search'])}' ";
    $select = $mysqli->query($command);  

  if ($select->num_rows > 0) {
// output data of each row
while($row = $select->fetch_assoc()) {
    echo "Word: " . $row["word"]. " " . $row["def"]. "<br>";
}
} else {
echo "0 results";
}

}

Answer 2

获取搜索字符串的HTML

<form method="POST" action="someurl.php">
<input type="search" name="search-string">
<input type="submit" value="Search">
</form>

从数据库获取数据的代码（可能有轻微的语法错误）。

$sql = "SELECT word,def FROM users WHERE word LIKE  '%{$mysqli->real_escape_string($_POST['search-string'])}% OR def LIKE ', '%{$mysqli->real_escape_string($_POST['search-string'])%}' ORDER BY word";
$result = $mysqli->query($sql);
$rows = [];
while ($row = $result->fetch_assoc()) {
     $rows[] = $row;
}

以HTML格式显示结果的代码

<?php if (count($rows) > 0) : ?>
<dl>
    <?php foreach ($rows as $r) : ?>
        <dt><?= htmlentities($r['word']) ?></dt>
        <dd><?= htmlentities($r['def']) ?></dd>
    <?php endforeach ?>
</dl>
<?php endif ?>

Answer 3

首先，您应该了解更多PHP并开始学习PHP中的OOP编码。其次，在您的代码中使用HTML5！（我在此答案中不使用它，请在Google上搜索有关HTML5的更多信息。）第三，我已根据您的要求更新了您的代码，但仍然不是最佳实践。

index.php档案：

        <?php

            $link = //here is where my database connection info would go
            if (mysqli_connect_error()) {
                die("Could not connect to database");
            }

            if(isset($_POST['add'])){
                $mysqli = //here is where my database connection info would go

                $word = $mysqli->real_escape_string($_POST['word']);
                $def = $mysqli->real_escape_string($_POST['def']);

                $sql = "INSERT INTO users (word,def) VALUES (".$word.",".$def.")";
                $insert = $mysqli->query($sql);
                if ($insert) {
                    echo 'success';
                } else {
                    echo 'error';
                }
            }

            if(isset($_POST['delete'])){
                $mysqli = //here is where my database connection info would go

                $word = $mysqli->real_escape_string($_POST['delete-word']);
                $def = $mysqli->real_escape_string($_POST['delete-def']);

                $sql = "DELETE FROM users WHERE `word`='".$word."' OR `def`='".$def."'";
                $delete = $mysqli->query($sql);
                if ($delete) {
                    echo 'success';
                } else {
                    echo 'error';
                }
            }
        ?>

        <html>
        <head>
        <link rel="stylesheet" type="text/css" href="style.css">
        <title>Dictionary search</title>
        </head>
        <body>

        <form class="forms" method="post" action="index.php">
        <input type="text" name="word" placeholder="Add Word...">
        <input type="text" name="def" placeholder="Add Definition...">
        <input type="submit" name="add" value="Add">
        </form><br>

        <form class="forms"  method="post" action="index.php">
        <input  type="text" name="delete-word" placeholder="Delete Word...">
        <input type="text" name="delete-def" placeholder="Delete Definition...">
        <input type="submit" name="delete" value="Delete">
        </form>

        <form class="forms"  method="post" action="search.php">
        <input type="text" name="search-word" placeholder="Look Up Word...">
        <input type="text" name="search-def" placeholder="Look Up Definition...">
        <input type="submit" name="search" value="Search Dictionary">
        </form>
        </body>
        </html>

search.php档案：

        <html>
<body>
    <?php
if(isset($_POST['search'])){
    //this is where the code would go to search the database and output the answer on the screen.
    $mysqli = //here is where my database connection info would go

    $search_w = $mysqli->real_escape_string($_POST['search-word']);
    $search_d = $mysqli->real_escape_string($_POST['search-def']);

    $sql = "SELECT FROM `users` WHERE `word`='' OR `def`=''";
    $result = $mysqli->query($sql);
    $rows = [];
    while ($row = $result->fetch_assoc()) :
        $rows[] = $row;
        ?>
        <p><?php echo $row; ?></p>
    <?php endwhile;
}
?>
    </body>
</html>

在搜索上显示mysql内容

3 个答案: