所以我在这里有一个表单，我想要做一些php，这样如果该字段为空，它会说一旦你在加载到帖子页面后提交表单，很遗憾你没有输入日期。我还想添加条带标签，但我不确定如果它们继续发布在posts_wall上，或者它们是否在form.php中？我想使用strip all tags。
我相信空的验证是if（！empty（（$ date））{echo“抱歉你没有输入日期”;}但是我无法让它工作。
如果你能帮助我，请提前感谢你。我将发布form.php和下面的发布墙。
form.php的
<!DOCTYPE HTML>
<html>
<head>
<link type="text/css" rel="stylesheet" href="../css/index.css" />
<link type="text/css" rel="stylesheet" href="../css/footer.css" />
<link type="text/css" rel="stylesheet" href="../css/header.css" />
<meta name="viewport" content="width=device-width" />
<title>Daily Dorm News</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<script>
$(function() {
$( "#datepicker" ).datepicker();
$('form').submit(function (e) {
var value;
// "message" pattern : from 3 to 150 alphanumerical chars
value = $('[name="message"]').val();
if (!/^[-\.a-zA-Z\s0-9]{3,150}$/.test(value)) {
alert('Sorry, only alphanumerical characters are allowed and 3-150 character limit".');
e.preventDefault();
return;
}
// "name" pattern : at least 1 digit
value = $('[name="name"]').val();
if (!/\d+/.test(value)) {
alert('Wrong value for "name".');
e.preventDefault();
return;
}
});
});
</script>
</head>
<body>
<?php include 'header.php' ?>
<form action="index.php" method="get">
<div id="container">
Username:*<input type="text" name="name" pattern="{3,15}" title="Letters and numbers only, length 3 to 15" required autofocus><br>
E-mail:* <input type="email" name="email" maxlength="20" required><br>
Post:*<br>
<textarea rows="15" cols="50" name='message'></textarea>
</div>
Date this event took place: <input type="text" name='date' id="datepicker" > <br>
Your favorite website is: <input type="text" name="website">
Gender:
<input type="radio" name="gender" value="female">Female
<input type="radio" name="gender" value="male">Male
<br>
<input type="reset" value="Reset">
<input type="submit">
</form>
<p> Fields with * next to them are required </p>
<p><a href="index.php">Posting Wall</a></p>
<div id="time">
<?php
$nextWeek = time() + (7 * 24 * 60 * 60);
// 7 days; 24 hours; 60 mins; 60secs
echo 'The time at which you are posting is:'. date('h:i Y-m-d') ."\n";
?>
</div>
<?php include 'footer.php' ?>
</body>
</html>
发布墙
<!DOCTYPE HTML>
<html>
<head>
<link type="text/css" rel="stylesheet" href="../css/post.css" />
<link type="text/css" rel="stylesheet" href="../css/heaader.css" />
<link type="text/css" rel="stylesheet" href="../css/footer.css" />
<meta name="viewport" content="width=device-width" />
<title>Daily Dorm News</title>
</head>
<body>
<h1>Daily Dorm News </h1>
<h2> You're best place for the latest dorm news from campus </h2>
<div id="container"> <?php if ( isset($_GET['name']) and preg_match("/^[A-Za-z0-9]+$/", $_GET['name']) ) {
echo $_GET['name'];
} else {
echo "You entered an invalid name!\n";
}
?><br>
Your email address is: <?php if ( isset($_GET['email']) and preg_match("/.+@.+\..+/i", $_GET['email']) ) {
echo $_GET['email'];
} else {
echo "You didn't enter a proper email address!\n";
}
?><br>
You Posted : <?php if ( isset($_GET['message']) and preg_match("/^[-\.a-zA-Z\s0-9]+$/", $_GET['message']) ) {
echo $_GET['message'];
} else {
echo "The message is not valid! The message box was blank or you entered invalid symbols!\n";
}
?>
This event happened :<?php echo $_GET["date"]; ?><br>
Your gender is:<?php echo $_GET["gender"]; ?><br>
Your favorite website is: <?php echo $_GET["website"]; ?><br>
</div>
<?php
/* [INFO/CS 1300 Project 3] index.php
* Main page for our app.
* Shows all previous posts and highlights the current user's post, if any.
* Includes a link to form.php if user wishes to create and submit a post.
*/
require('wall_database.php');
// Fetching data from the request sent by form.php
$name = strip_tags($_REQUEST['name']);
$email = strip_tags($_REQUEST['email']);
$message = strip_tags($_REQUEST['message']);
$date = strip_tags($_REQUEST['date']);
$gender = strip_tags($_REQUEST['gender']);
$website = strip_tags($_REQUEST['website']);
$is_valid_post = true;
// Checking if a form was submitted
if (isset($_REQUEST['name'])){
// Fetching data from the request sent by form.php
$name = strip_tags($_REQUEST['name']);
$email = strip_tags($_REQUEST['email']);
$message = strip_tags($_REQUEST['message']);
$date = strip_tags($_REQUEST['date']);
$gender = strip_tags($_REQUEST['gender']);
$website = strip_tags($_REQUEST['website']);
// Saving the current post, if a form was submitted
$post_fields = array();
$post_fields['name'] = $name;
$post_fields['email'] = $email;
$post_fields['message'] = $message;
$post_fields['date'] = $date;
$post_fields['gender'] = $gender;
$post_fields['website'] = $website;
$success_flag = saveCurrentPost($post_fields);
}
//Fetching all posts from the database
$posts_array = getAllPosts();
?>
<?php
if(isset($name)) {
echo "<h3>Thanks ".$name." for submitting your post.</h3>";
}
?>
<div id="logo"> Don't forget to tell all you're friends about Daily Dorm News! <br> The only dorm news website on campus!</div>
<p id="received">Here are all the posts we have received.</p>
<ul id="posts_list">
<?php
// Looping through all the posts in posts_array
$counter = 1;
foreach(array_reverse($posts_array) as $post){
$alreadyPosted = false;
$name = $post['name'];
$email = $post['email'];
$message = $post['message'];
$date = $post['date'];
$gender = $post['gender'];
$website = $post['website'];
if ($counter % 2==1)
$li_class = "float-left";
else
$li_class = "float-right";
if ($name == $_GET['name']) {
$alreadyPosted = true;
}
echo '<div class=post';
if ($alreadyPosted) {
echo ' id="highlight"';
}
echo '>';
echo '<li class="'.$li_class.'"><h3><span>'.$name.'</span> wrote a post.</h3></li>';
echo '<li class="'.$li_class.'"><h3><span>'.$name.' email is: '.$email.'</span></h3></li>';
echo '<li class="'.$li_class.'"><h3><span>'.$name.' wrote '.$message.'</span> wrote a post.</h3></li>';
echo '<li class="'.$li_class.'"><h3><span>This event occured on '.$date.'</span></h3></li>';
echo '<li class="'.$li_class.'"><h3><span>Your a '.$gender.'</span></h3></li>';
echo '<li class="'.$li_class.'"><h3><span>You said your favorite website is '.$website.'</span></h3></li>';
echo '</div>';
}
?>
</ul>
</div>
<p id="submit"><a href="../index.php">Would you like to submit another post?</a></p>
<?php require 'footer.php' ?>
</body>
</html>
答案 0 :(得分：0)
应该是
if(empty(($date)) {
echo "sorry you did not enter a date";
}
不会
if(!empty(($date)) {
echo "sorry you did not enter a date";
}
如果日期字段为空，则第一个表达式将打印“抱歉，您没有输入日期”。如果日期字段不为空，则第二个表达式将打印该消息。
您可以尝试以下代码。它将打印'这是一个空字符串'
<?php
$date = '';
if (empty($date)) {
echo 'This is an empty string';
}
if (!empty($date)) {
echo 'The date is ' . $date;
}
答案 1 :(得分：0)
您可以在提交功能
中查看jqueryvar datepicker=$("#datepicker").val();
if(datepicker=='') { alert('Please enter date'); return false; }