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我想出了一个让我疯狂的问题，因为我是PHP的新手。问题是：下面的时间表提交表单在Chrome上运行良好（每次我离开电子邮件未填写，提交无法处理）。但是，在Safari上使用时，您始终可以将空白表单提交到数据库中。如何仅在输入不为空时将数据插入数据库？
这里是html表单。
<script type="text/javascript" src="/membership/my-form/js/jquery-2.1.1.js"></script>
<script type="text/javascript" src="/membership/my-form/js/main.js"></script>
<form class="mf-form floating-labels" method="post" action="timetablesubmit.php">
<div>
<h1 style="text-align:center">Availability form</h1>
</div>
<div>
<p class="mf-select icon">
<select name="timetable-staff" class="user" required>
<option value="">Select Person</option>
<option value="AMY">Amy</option>
<option value="TOM">Tom</option>
</select>
</p>
<div>
<input name="location1" value="A" type="hidden">
<input name="location2" value="B" type="hidden">
</div>
<div class="AMY box">You work in A.</div>
<div class="TOM box">You work in B.</div>
</div>
<div class="icon">
<label class="mf-label" for="mf-email">Email Address</label>
<input class="email" type="email" name="timetable-email" id="mf-email" required>
</div>
</form>
<script type="text/javascript">
$(document).ready(function(){
$("select").change(function(){
$("select option:selected").each(function(){
if($(this).attr("value")=="Amy"){
$(".box").hide();
$(".AMY").show();
}
if($(this).attr("value")=="Tom"){
$(".box").hide();
$(".TOM").show();
}
});
}).change();
});
</script>
<style type="text/css">
.box{
padding: 10px;
display: none;
margin-top: 20px;
border: 1px solid #000;
font-size:1.6em;
text-align:center;
background-color: #f1f1f1;
}
</style>
这里是timetablesubmit.php：
<?php
header("content-type:text/html;charset=utf-8");
session_start();
$timesubmit=date('Y-m-d H:i:s');
$staff=$_POST['timetable-staff'];
$email=$_POST['timetable-email'];
$con=mysql_connect("localhost","database","password");
if (!$con) {
die ('Could not connect:' . mysql_error());
}
mysql_select_db("database", $con);
mysql_query("set names utf8");
mysql_query("INSERT INTO timetable(staff,email)
VALUES('$staff','$email')");
mysql_close($con);
sleep(2);
?>
<html>
<? require 'header.php'; ?>
<div class="tk-reg">
<p>Thak you <?php echo $_POST['timetable-staff']; ?><p>
<p> Time availability submitted successfully.<p>
Your email address is: <?php echo $_POST["timetable-email"]; ?>
</div>
<div class="tk-regfollow">
<ul style="text-align:center">
<a href="/membership/index.php">Back to home page.</a>
</ul>
</div>
</html>
然后我在网上搜索，并改为下面，仍然没有在Safari工作（出现警报，但仍数据插入了进入数据库
<?php
require 'header.php';
$nameErr = $emailErr = "";
$name = $email = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["timetable-staff"])) {
$nameErr = "Please select a staff.";
} else {
$staff = test_input($_POST["timetable-staff"]);
}
if (empty($_POST["timetable-email"])) {
$emailErr = "Email address is required";
} else {
$email = test_input($_POST["timetable-email"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
$con=mysql_connect("localhost","database_name","database_password");
if (!$con) {
die ('Could not connect:' . mysql_error());
}
mysql_select_db("database_name", $con);
mysql_query("set names utf8");
mysql_query("INSERT INTO timetable(staff,email)
VALUES('$staff','$email')");
mysql_close($con);
sleep(2);
?>
<html>
<style>
.error {color: #FF0000;}
</style>
<h1 style="text-align:center">Availability form for
<?php
$d=strtotime("+1 Months");
echo date("M", $d) . " 2015 <br>";
?>
</h1>
<form class="mf-form floating-labels" method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<div>
<p class="mf-select icon">
<select name="timetable-staff" class="user" required>
<option value="">Select Person</option>
<option value="AMY">Amy</option>
<option value="TOM">Tom</option>
</select>
<span class="error">* <?php echo $nameErr;?></span>
</p>
</div>
<div class="icon">
<label class="mf-label" for="mf-email">Email Address</label>
<input class="email" type="email" name="timetable-email" id="mf-email" required>
<span class="error">* <?php echo $emailErr;?></span>
</div>
<br><br>
<input type="submit" name="submit" value="Submit">
</form>
</html>
我希望有人能帮我指出我的错误需要。谢谢。
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我试了很多方法来解决这个问题，但是仍然有'this'或'that'问题。我终于使用了一种实际可行的方法，但我不知道它是否不被推荐。
这是我在timetablesubmit.php 修改了代码（我的流程是：timetable.php ==> timetablesubmit.php ==>的welcome.php）
$email = trim($_POST['timetable-email']);
if($email !='' and $email !=null) {
$sql1;
}
else {
echo '<html><head>
<link rel="stylesheet" type="text/css" href="/membership/style.css"/>
<head>
<div class="check-error-message">
<p>Error: Email address is required.</p><br>
<a href="javascript:history.back(-1);">Return</a>
</div>';
exit;
};
PHP无关与浏览器。你使用的是什么版本的jQuery？ –