所以我有以下代码:
<body>
<?php
$firstname = $lastname = $phone = $phone = $email = $date = $code = "";
$firstnameerr = $lastnameerr = $phoneerr = $emailerr = $dateerr = $codeerr = "";
$check = 0;
$str = "abcdefghijklmnopqrstuvwxyz";
$rand1 = $str[rand(0, strlen($str) - 1)];
$rand2 = $str[rand(0, strlen($str) - 1)];
$rand3 = $str[rand(0, strlen($str) - 1)];
$rand4 = $str[rand(0, strlen($str) - 1)];
$rand5 = $str[rand(0, strlen($str) - 1)];
$final = $rand1 . $rand2 . $rand3 . $rand4 . $rand5;
if ($_SERVER["REQUEST_METHOD"] == "POST"){
if (empty($_POST["ffirstname"])){
$firstnameerr = "First Name is empty!";
$check = 1;
} else {
$firstname = testInput($_POST['ffirstname']);
$check = 0;
if (!preg_match("/^[a-zA-Z]*$/",$firstname)){
$firstnameerr = "This is not a valid name!";
$check = 1;
}
}
if (empty($_POST["flastname"])){
$lastnameerr = "Last Name is empty!";
$check = 1;
} else {
$lastname = testInput($_POST['flastname']);
$cheek = 0;
if (!preg_match("/^[a-zA-Z ]*$/",$lastname)){
$lastnameerr = "This is not a valid name";
$check = 1;
}
}
if (empty($_POST["fphone"])){
$phoneerr = "Phone field is empty!";
$check = 1;
}else {
$phone = testInput($_POST['fphone']);
if(!is_numeric($phone)){
$phoneerr = "Phone number is not a number";
$check = 1;
}
}
if (empty($_POST["femail"])){
$emailerr = "E-mail field is empty!";
} else {
$email = testInput($_POST['femail']);
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailerr = "E-mail is not valid";
$check = 1;
}
}
if (empty($_POST["fdate"])){
$dateerr = "No date selected!";
$check = 1;
} else {
$date = testInput($_POST['fdate']);
}
if (empty($_POST["fcode"])){
$codeerr = "There is no code!";
$check = 1;
} else {
$code = $_POST["fcode"];
if ($code !== $final){
$codeerr = "The code is wrong";
$check = 1;
}
}
if ($check == 0) {
$host = "localhost";
$user = "root";
$pass = "";
$db = "myfirstdb";
$connect = new mysqli($host,$user,$pass,$db);
if ($connect->connect_error){
die("Connection failed: " . $connect->connect_error);
} else {
echo "Connected successfully!";
}
$sql = "INSERT INTO table1 (firstname , lastname , phone , email , date) VALUES ('$firstname', '$lastname', '$phone', '$email', '$date')";
if ($connect->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $connect->error;
}
$connect->close();
}
}
function testInput($data){
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<div id="header">
<img src="http://stupidname.org/files/gfx/design/random%20logos/RandomLogo1.png" alt="logo" height="250px" width="250px">
<div id="top"><h1 id="first">Welcome to my website</h1></div>
</div>
<div id="section">
<div id="nav">
<ul>
<li><a href="LINK1" id="first">Home</a></li>
<li><a href="LINK2">About</a></li>
<li><a href="LINK3">Project</a></li>
<li><a href="LINK4">Contact</a></li>
</ul>
</div>
<div id="article">
<h3 style="text-align: center"><b>Please confirm the form below:</b></h3>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<p class="namer">First Name</p><br>
<input type="text" name="ffirstname" id="ffirstnameid"><span class="error"><?php echo $firstnameerr; ?></span><br>
<p class="namer">Last Name</p><br>
<input type="text" name="flastname" id="flastnameid"><span class="error"><?php echo $lastnameerr; ?></span><br>
<p class="namer">Phone Number</p><br>
<input type="text" name="fphone" id="fphoneid"><span class="error"><?php echo $phoneerr; ?></span><br>
<p class="namer">E-mail</p><br>
<input type="text" name="femail" id="femailid"><span class="error"><?php echo $emailerr; ?></span><br>
<p class="namer">Date</p><br>
<input type="text" name="fdate" id="fdateid"><span class="error"><?php echo $dateerr; ?></span><br>
<p class="namer">Enter the Captcha code!</p><br>
<h1><?php echo $final?></h1><br>
<input type="text" name="fcode" id="fcodeid"><span class="error"><?php echo $codeerr; ?></span><br>
<input type="submit" name="fsubmit" value="Submit">
</form>
</div>
</div>
我的问题是与代码a.k.a如果使用$code和$final检查它是否是一个人或不是。现在，每当我在$final变量中写入完全相同的东西时，程序认为它不一样，所以我得到$codeerr。有人能帮我修一下吗?
好的，我对你的代码做了一些修改，我想现在应该可以工作了。
<?php
session_start();
?>
<body>
<?php
function generateCode() {
$str = "abcdefghijklmnopqrstuvwxyz";
$rand1 = $str[rand(0, strlen($str) - 1)];
$rand2 = $str[rand(0, strlen($str) - 1)];
$rand3 = $str[rand(0, strlen($str) - 1)];
$rand4 = $str[rand(0, strlen($str) - 1)];
$rand5 = $str[rand(0, strlen($str) - 1)];
return $rand1 . $rand2 . $rand3 . $rand4 . $rand5;
}
$firstname = $lastname = $phone = $phone = $email = $date = $code = "";
$firstnameerr = $lastnameerr = $phoneerr = $emailerr = $dateerr = $codeerr = "";
$check = 0;
if(!isset($_SESSION['final'])) {
$_SESSION['final'] = generateCode();
}
if ($_SERVER["REQUEST_METHOD"] == "POST"){
if (empty($_POST["ffirstname"])){
$firstnameerr = "First Name is empty!";
$check = 1;
} else {
$firstname = testInput($_POST['ffirstname']);
$check = 0;
if (!preg_match("/^[a-zA-Z]*$/",$firstname)){
$firstnameerr = "This is not a valid name!";
$check = 1;
}
}
if (empty($_POST["flastname"])){
$lastnameerr = "Last Name is empty!";
$check = 1;
} else {
$lastname = testInput($_POST['flastname']);
$cheek = 0;
if (!preg_match("/^[a-zA-Z ]*$/",$lastname)){
$lastnameerr = "This is not a valid name";
$check = 1;
}
}
if (empty($_POST["fphone"])){
$phoneerr = "Phone field is empty!";
$check = 1;
}else {
$phone = testInput($_POST['fphone']);
if(!is_numeric($phone)){
$phoneerr = "Phone number is not a number";
$check = 1;
}
}
if (empty($_POST["femail"])){
$emailerr = "E-mail field is empty!";
} else {
$email = testInput($_POST['femail']);
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailerr = "E-mail is not valid";
$check = 1;
}
}
if (empty($_POST["fdate"])){
$dateerr = "No date selected!";
$check = 1;
} else {
$date = testInput($_POST['fdate']);
}
if (empty($_POST["fcode"])){
$codeerr = "There is no code!";
$check = 1;
} else {
$code = $_POST["fcode"];
if ($code !== $_SESSION['final']){
$codeerr = "The code is wrong";
$check = 1;
}
}
if ($check == 0) {
$host = "localhost";
$user = "root";
$pass = "";
$db = "myfirstdb";
$connect = new mysqli($host,$user,$pass,$db);
if ($connect->connect_error){
die("Connection failed: " . $connect->connect_error);
} else {
echo "Connected successfully!";
}
$sql = "INSERT INTO table1 (firstname , lastname , phone , email , date) VALUES ('$firstname', '$lastname', '$phone', '$email', '$date')";
if ($connect->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $connect->error;
}
$connect->close();
}
}
if($check == 1) {
$_SESSION['final'] = generateCode();
}
function testInput($data){
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<div id="header">
<img src="http://stupidname.org/files/gfx/design/random%20logos/RandomLogo1.png" alt="logo" height="250px" width="250px">
<div id="top"><h1 id="first">Welcome to my website</h1></div>
</div>
<div id="section">
<div id="nav">
<ul>
<li><a href="LINK1" id="first">Home</a></li>
<li><a href="LINK2">About</a></li>
<li><a href="LINK3">Project</a></li>
<li><a href="LINK4">Contact</a></li>
</ul>
</div>
<div id="article">
<h3 style="text-align: center"><b>Please confirm the form below:</b></h3>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<p class="namer">First Name</p><br>
<input type="text" name="ffirstname" id="ffirstnameid"><span class="error"><?php echo $firstnameerr; ?></span><br>
<p class="namer">Last Name</p><br>
<input type="text" name="flastname" id="flastnameid"><span class="error"><?php echo $lastnameerr; ?></span><br>
<p class="namer">Phone Number</p><br>
<input type="text" name="fphone" id="fphoneid"><span class="error"><?php echo $phoneerr; ?></span><br>
<p class="namer">E-mail</p><br>
<input type="text" name="femail" id="femailid"><span class="error"><?php echo $emailerr; ?></span><br>
<p class="namer">Date</p><br>
<input type="text" name="fdate" id="fdateid"><span class="error"><?php echo $dateerr; ?></span><br>
<p class="namer">Enter the Captcha code!</p><br>
<h1><?php echo $_SESSION['final']?></h1><br>
<input type="text" name="fcode" id="fcodeid"><span class="error"><?php echo $codeerr; ?></span><br>
<input type="submit" name="fsubmit" value="Submit">
</form>
</div>
</div>
必须将$final代码保存在$_SESSION中，因为在提交表单后，生成$final的代码将被执行，而$final将获得与提交前渲染代码不同的新值。