如何创建一个自动php函数,如果是,则检查是否提交任何类型的数据,然后显示发布的数据

时间:2017-07-21 08:33:09

标签: javascript php

我在网址https://akshayshrivastav.me/index.php

上托管了一个php文件

我正在做的是在Mozilla浏览器上保持此URL保持打开状态。

我正在做的是我从Chrome浏览器向该网址发送帖子请求现在发生的事情是我有以下代码

<?php
    if($_POST)
        {
            print_r($_POST);   
        }
    else
        {
            echo "No Request Received! Please Check the Request You Are Trying To Make!";
        }
?>

以上代码将在chrome浏览器上运行,因为当表单f = data发布到此url时,页面将显示已发布的内容。

但是在mozilla浏览器中,我想要的是即使数据是通过Chrome浏览器提交的,只要对后面的url发布帖子或获取请求并显示发布的值,它就应该在mozzila浏览器中动态刷新页面。

请帮助逻辑。

2 个答案:

答案 0 :(得分:3)

我正在使用表格代码:

CREATE TABLE `items` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `time` int(10) NOT NULL,
   PRIMARY KEY (id)
)

我已将所有内容都写在1个文件中,但您应该至少分开表单。简短版本:每隔X秒/分钟从jQuery发送POST请求并检查返回值。如果我们得到X值,我们重新加载页面,否则,继续发送请求。

我评论了一些内容,以便更好地理解为什么我这样写。它可能并不完美(我可能已经错过了一些东西),但总的来说它工作(测试过):

<?php
$db = new mysqli('localhost', 'root', 'password', 'test_database');

/* Must connect to database first, otherwise it's no use */
if ($db->connect_errno) {
    exit('Connection failed because: '.$db->connect_error);
}

/* Check if we received $_POST from jQuery script */
if (isset($_POST['lastRow'])) {
    $query = $db->query('SELECT id FROM items ORDER BY id DESC LIMIT 1');
    $result = $query->fetch_array(MYSQLI_ASSOC);

    if (is_null($result)) {
        $lastRow = 0;
    } else {
        $lastRow = $result['id'];
    }

    /* Return 1 if DB was changed, otherwise, return 0 */
    if ($_POST['lastRow'] != $lastRow) {
        echo 1;
    } else {
        echo 0;
    }

    /* We don't need to print entire HTML code */
    exit;
}

/* Add new item through $_POST */
if (!empty($_POST['item_name'])) {
    $item = $db->real_escape_string($_POST['item_name']);
    $query = $db->query('INSERT INTO items (name, time) VALUES("'.$item.'", '.time().')');

    if ($query) {
        echo 'Item successfully added!<br>';
    } else {
        echo 'Item was not successfully added because: '.$db->error.'<br>';
    }
}
?>

<!DOCTYPE html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
    <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
    <title>Page with items list</title>
</head>
<body>

<?php
$query = $db->query('SELECT id FROM items ORDER BY id DESC LIMIT 1');
$result = $query->fetch_array(MYSQLI_ASSOC);

/* If table is empty, give 0 rows, otherwise, take last ID */
if (is_null($result)) {
    $lastRow = 0;
} else {
    $lastRow = $result['id'];
}
?>

<!-- FORM AREA -->
<div id="form_div" class="col-lg-2 form-group">
    <form action="" method="post">
        <label for="item_name">Item name:</label>
        <input type="text" id="item_name" name="item_name" class="form-control" placeholder="Enter item name">
        <input type="submit" class="btn btn-primary" value="Insert">
    </form>
</div>

<!-- ROW PRINTING AREA -->
<div id="table_div" class="col-log-12">
    <table class="table">
        <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Creation time</th>
        </tr>
    <?php
    $query = $db->query("SELECT * FROM items");

    while ($result = $query->fetch_array(MYSQLI_ASSOC)) {
    ?>
        <tr>
            <td><?php echo $result['id']; ?></td>
            <td><?php echo $result['name']; ?></td>
            <td><?php echo date('Y-m-d', $result['time']); ?></td>
        </tr>
    <?php
    }
    ?>
    </table>
</div>

<!-- Launching script when document is loaded -->
<script type="text/javascript">
$(document).on('ready', function(e) {
    function checkData() {
        /* Sending POST HTTP request */
        $.post('consi.php', { lastRow: <?php echo $lastRow; ?> }, function(data) {
            if (data == 1) {
                /* OK, last row was changed, so just reload the page to see new results */
                window.location.href = window.location.href;
            }
        });     
    }

    /* 1000 -> 1 second */
    setInterval(checkData, 5000);
});
</script>

</body>
</html>

答案 1 :(得分:1)

请在index.php文件中尝试以下代码

<meta http-equiv="refresh" content="30">

其中值30是时间。