Question

在我的PHP代码中，我只想连接到MySql数据库，然后检查长度值，但是当我这样做时，它会将页面重定向到PHP文件。如何仅通过主页面显示警报？

<?php 
$servername = "localhost";
$username = "root";
$password = "abc123";
$dbname = "redstonegaming";
$ip = get_client_ip();
$datetime = date("l jS \of F Y h:i:s A");
$temp1 = $_GET["name"];
$temp2 = $_GET["comment"];
$comment = "";
$commentname = "";
if (strlen($temp1) < 1)
{
    echo "<script>alert('Your message must be more than 0 characters!');</script>";
}

else if (strlen($temp2) > 300)
{
    echo "<script>alert('Your message must be less than 300 characters!');</script>";
}
else {
    send();
}

function get_client_ip() {
    $ipaddress = '';
    if (getenv('HTTP_CLIENT_IP'))
        $ipaddress = getenv('HTTP_CLIENT_IP');
    else if(getenv('HTTP_X_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_X_FORWARDED_FOR');
    else if(getenv('HTTP_X_FORWARDED'))
        $ipaddress = getenv('HTTP_X_FORWARDED');
    else if(getenv('HTTP_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_FORWARDED_FOR');
    else if(getenv('HTTP_FORWARDED'))
       $ipaddress = getenv('HTTP_FORWARDED');
    else if(getenv('REMOTE_ADDR'))
        $ipaddress =  getenv('REMOTE_ADDR');
    else
        $ipaddress = 'UNKNOWN';
    return $ipaddress;
}

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) 
{
    echo "<script>alert('Connection failed: ' . $conn->connect_error);</script>";
} 

function send() 
{
    $sql = "INSERT INTO comments(Name, Message, Ip_Address, dateTime) VALUES ('$commentname','$comment','$ip','$datetime')";
}

if ($conn->query($sql) === TRUE) 
{
    echo "<script>alert('New Record Created Successfully!');</script>";
} 
else 
{
    echo "<script>alert('Error: ' . $sql . '<br>' . $conn->error');</script>";
}

$conn->close();
?>

＆＃13;

var rick = false;
var audio = new Audio('rick_roll.mp3');
var kkeys = [],
  konami = "38,38,40,40,37,39,37,39,66,65,13";
$(document).keydown(function(e) {
  kkeys.push(e.keyCode);
  if (kkeys.toString().indexOf(konami) >= 0) {
    kkeys = []; // <-- Change here
    if (rick == false) {
      rick = true;
      audio.play();
    } else if (rick == true) {
      rick = false;
      audio.pause(); // <-- another issue
    }
  }
});

＆＃13;

/*Some Fonts Here:*/
@font-face { font-family: Rusty; src: url('BrushScriptStd.otf');}
* {
	font-family: Rusty;
	font-weight: Lighter;
}
.background
{
	background-image: url(0.jpg);
	background-attachment: fixed;
	background-size: 100% auto;
	background-color: f7f7f7;
	background-repeat: no-repeat;
	background-position:absolute;
}
.menubar {
  position: relative;
  height: 2.8vw;
  opacity: 0.85;
  background-color: #CCCCCC;
  z-index: 1;
}
.clearfix:after {
  display: block;
  clear: both;
}
.menu-wrap {
  width: 50%;
  box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.2);
  background: #3e3436;
}
.menu {
  width: 100%;
  margin: 0px auto;
  text-align: center;
}
.menu li {
  margin: 0px;
  list-style: none;
  font-family: 'Ek Mukta';
}
.menu a {
  transition: all linear 0.15s;
  color: #919191;
}
.menu li:hover > a,
.menu .current-item > a {
  text-decoration: none;
  color: rgba(189, 34, 34, 1);
}
.menu .arrow {
  font-size: 0.95vw;
  line-height: 0%;
}
.menu > ul > li {
  float: middle;
  display: inline-block;
  position: relative;
  font-size: 1.2vw;
}
.menu > ul > li > a {
  padding: 0.7vw 5vh;
  display: inline-block;
  text-shadow: 0px 1px 0px rgba(0, 0, 0, 0.4);
}
.menu > ul > li:hover > a,
.menu > ul > .current-item > a {
  background: #2e2728;
}
.menu li:hover .sub-menu {
  display: block;
}
.sub-menu {
  width: 100%;
  padding: 0px 0px;
  position: absolute;
  top: 100%;
  left: 0px;
  display: none;
  transition: opacity linear 5.8s;
  box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.2);
  background: #2e2728;
}
.sub-menu li {
  display: block;
  font-size: 1.2vw;
}
.sub-menu li a {
  padding: 10px 10px;
  display: block;
}
.sub-menu li a:hover, .sub-menu .current-item a {
  background: #3e3436;
}
.Rusty 
{
	font-family: "Rusty";
	color: rgba(189, 34, 34, 1);
	display: inline;
}
.content
{
	opacity: .85;
	position: relative;
	margin: auto;
    width: 80%;
	z-index: 0; 
    background-color: #CCCCCC;
    padding: 10px;
	height: 100%;
	text-align: center;
}
.menu > ul > .login 
{
    position: absolute;
    top: 0;
    right: 0;
}
.video-container {
	position:relative;
	padding-bottom: 5%;
	padding-top: 30px;
	width: 100%;
}

.video-container iframe, .video-container object, .video-container embed {
	position: relative;
	top:15%;
	width: 27vw;
	height:27vh;
}
.title
{
	text-align: center;
	font-size: 7vh;
	text-decoration: underline;
	-moz-text-decoration-color: inherit;
    text-decoration-color: inherit;
}
.feed-column
{
	width: 50%;
	height: 100%;
}
.border-right
{
	border-right: thick solid rgba(189, 34, 34, 1);
}
.text-center
{
	text-align: center;
}
.footer
{
    background: #CCCCCC;
	position:fixed;
    bottom:0px;
    height: 50px;
    width: 100%;
	opacity: .85;
}
.yt-title
{
	font-size: 3.3vh;
}

＆＃13;

<html>
  <head>
    <meta name="generator"
    content="HTML Tidy for HTML5 (experimental) for Windows https://github.com/w3c/tidy-html5/tree/c63cc39" />
    <link rel="stylesheet" type="text/css" href="style.css" />
    <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" />
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
    <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
    <link rel="stylesheet" href="http://s.ytimg.com/yts/cssbin/www-subscribe-widget-webp-vflj9zwo0.css"
    name="www-subscribe-widget" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <script src="script.js"></script>
    <link rel="shortcut icon" href="favicon.ico" />
    <title>RG - Home</title>
    <style>
#comment_form input, #comment_form textarea {
        border: 4px solid rgba(0,0,0,0.1);
        padding: 8px 10px;
        
        -webkit-border-radius: 5px;
        -moz-border-radius: 5px;
        border-radius: 5px;
        
        outline: 0;
}

#comment_form textarea {
        width: 350px;
}

#comment_form input[type=&quot;submit&quot;] {
        cursor: pointer;
        background: -webkit-linear-gradient(top, #efefef, #ddd);
        background: -moz-linear-gradient(top, #efefef, #ddd);
        background: -ms-linear-gradient(top, #efefef, #ddd);
        background: -o-linear-gradient(top, #efefef, #ddd);
        background: linear-gradient(top, #efefef, #ddd);
        color: #333;
        text-shadow: 0px 1px 1px rgba(255,255,255,1);
        border: 1px solid #ccc;
}

#comment_form input[type=&quot;submit&quot;]:hover {
        background: -webkit-linear-gradient(top, #eee, #ccc);
        background: -moz-linear-gradient(top, #eee, #ccc);
        background: -ms-linear-gradient(top, #eee, #ccc);
        background: -o-linear-gradient(top, #eee, #ccc);
        background: linear-gradient(top, #eee, #ccc);
        border: 1px solid #bbb;
}

#comment_form input[type=&quot;submit&quot;]:active {
        background: -webkit-linear-gradient(top, #ddd, #aaa);
        background: -moz-linear-gradient(top, #ddd, #aaa);
        background: -ms-linear-gradient(top, #ddd, #aaa);
        background: -o-linear-gradient(top, #ddd, #aaa);
        background: linear-gradient(top, #ddd, #aaa);   
        border: 1px solid #999;
}
.align-middle
{
position: absolute;
}
</style>
  </head>
  <body class="background">
    <div class="menubar">
      <nav class="menu">
        <ul class="clearfix">
          <li>
            <a href="aboutme.html">About Me 
            <span class="arrow">▼</span></a>
            <ul class="sub-menu">
              <li>
                <a href="#">Gaming</a>
              </li>
              <li>
                <a href="#">Programming</a>
              </li>
              <li>
                <a href="#">YouTube</a>
              </li>
              <li>
                <a href="#">Other</a>
              </li>
            </ul>
          </li>
          <li>
            <a href="schedule.html">Schedule</a>
          </li>
          <li class="current-item">
            <a href="#">
              <img style="width: 2.3vh; height: 1.6vw;" align="left" src="favicon.ico" />
              <p align="middle" class="rusty">RedstoneGaming</p>
              <img style="width: 2.3vh; height: 1.6vw;" align="right" src="favicon.ico" />
            </a>
          </li>
          <li>
            <a href="equipment.html">Equipment</a>
          </li>
          <li>
            <a href="contact.html">Contact Me</a>
          </li>
          <li class="login">
            <a href="login.html">Login/Sign Up</a>
          </li>
        </ul>
      </nav>
    </div>
    <div class="content">
      <h1 class="rusty title">RedstoneGaming Comments</h1>
      <div class="border-right feed-column align-middle">
        <div id="comment_form">
          <form action="welcome.php" method="get">
          <input type="text" name="name" id="name" value="" placeholder="Name" /> 
          <textarea rows="10" name="comment" id="comment" placeholder="Enter your message here"></textarea>
            <input type="submit" name="submit" value="Add Comment" /></form>
        </div>
      </div>
      <div class="feed-column"></div>
    </div>
    <div class="footer">vv</div>
  </body>
</html>

＆＃13;

Answer 1

您在表单中未包含 action =＆＃34;＆＃34; 标记。所以当你按提交时，脚本不知道在哪里执行。

通过

修复它

<form action="welcome.php" method="get" action="">

对于您的问题，最简单的解决方案是将PHP脚本包含在HTML文档的顶部，其中包含空操作=＆＃34;＆＃34; 标记。它将在该页面上查找php脚本。

注意这是一种不好的做法。如果您在操作标记中使用其他页面，请确保在PHP中添加header（）函数以重定向（如果需要，可以在某处）。

还有一个通知。你的函数send（）不会执行SQL，它基本上只是将sql语句存储在变量中。

希望它有所帮助，

PHP文件重定向/离开主页面

1 个答案: