Question

您好我正在尝试在php中验证表单。表单将验证名称，电子邮件，性别和密码。出于某种原因，我仍然可以提交数据，并且不会显示任何消息，这意味着我在php中创建的验证代码不起作用。我还在表单上添加了php代码，因此它可以显示错误但没有。我已经在网上看过教程和内容但仍然无法找到错误。可以帮我弄清楚为什么会发生这种情况？谢谢！

<!DOCTYPE html>
<html>
<head>
<title>Form Validation with PHP - Demo Preview</title>
<style>
.error{
    color:red
}
</style>
</head>
<body>
<?php
// Initialize variables to null.
$nameError ="";
$emailError ="";
$genderError ="";
$passwordError ="";


//kur shtypim butonin submit
if(isset($_POST['submit'])){

    //ne rast se emri eshte bosh  
    if (empty($name)) {
        $nameError = "Vendosni emrin";
    } 

    // emri permban vetem shkronja dhe hapesira
    if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
        $nameError = "Lejohen vetem shkronja dhe hapesire te bardha";
    }

    //ne rast se email eshte bosh
    if (empty($email)) {
        $emailError = "Vendosni email";
    } 

    // pattern email
    if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
        $emailError = "Format i pavlefshem email";
    }


    if(empty($password)){
        $passwordError="Vendosni password";
    }

    //pattern password
    if(!preg_match("/^\w{6,10}$/", $password)){
        $passwordError="Passwordi duhet te jete 6 deri ne 10 karaktere"; 
    }

    if (empty($gender)) {
        $genderError = "Vendosni gjinine";
    } 
     }
//php code ends here
?>

    <h2>Form Validation with PHP.</h2>

    <form action="Ushtrimi3_2014.php" method="post">
    <h2>Form</h2>

        Emri:
        <input name="name" type="text" value="">
        <?php echo $nameError;?>
        E-mail:
        <input name="email" type="text" value="">
        <?php echo $emailError;?>
        Password:
        <input name="password" type="text" value="">
        <?php echo $passwordError;?>
        Gender:
        <input name="gender" type="radio" value="female">Female
        <input name="gender" type="radio" value="male">Male
        <?php echo $genderError;?>

        <input class="submit" name="submit" type="submit" value="Submit">
        </form>
    </div>
</body>
</html>

Answer 1

我注意到您的代码中存在一些错误。你忘了关闭主要条件。按下提交按钮后，变量应该分配我重写了你的代码它可能会有所帮助

<!DOCTYPE html>
<html>
<head>
<title>Form Validation with PHP - Demo Preview</title>
<style>
.error{
color:red
}
</style>
</head>
<body>
 <?php
// Initialize variables to null.
$nameError ="";
$emailError ="";
$genderError ="";
$passwordError ="";



//kur shtypim butonin submit
if(isset($_POST['submit'])){



//ne rast se emri eshte bosh  
if (empty($_POST['emri'])) {
$nameError = "Vendosni emrin";
} 

// emri permban vetem shkronja dhe hapesira
else if (!preg_match("/^[a-zA-Z ]*$/",$_POST['emri'])) {
$nameError = "Lejohen vetem shkronja dhe hapesire te bardha";
}
else{
$name=$_POST['emri'];
}


//ne rast se email eshte bosh
if (empty($_POST['email'])) {
$emailError = "Vendosni email";
} 

// pattern email
else if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$_POST['email'])) {
$emailError = "Format i pavlefshem email";
}
else{
$email=$_POST['email'];
}


if(empty($_POST['password'])){
$passwordError="Vendosni password";
 }

//pattern password
 else if(!preg_match("/^\w{6,10}$/", $_POST['password'])){
    $passwordError="Passwordi duhet te jete 6 deri ne 10 karaktere"; 
    }

  else{
    $password=$_POST['password'];
  }

if (empty($_POST['gender'])) {
$genderError = "Vendosni gjinine";
}
else{
$gender=$_POST['gender'];
}

}
//php code ends here
?>

<h2>Form Validation with PHP.</h2>

<form action="" method="post">
<h2>Form</h2>


Emri:
<input name="emri" type="text" value="<?=(isset($name)?$name:"")?>">
<?php echo $nameError;?>
E-mail:
<input name="email" type="text" value="<?=(isset($email)?$email:"")?>">
<?php echo $emailError;?>
Password:
<input name="password" type="text" value="<?=(isset($password)?    $password:"")?>">
<?php echo $passwordError;?>
Gender:
<input name="gender" type="radio" <?=(isset($gender) &&             ($gender=="female"))?"checked":""?> value="female">Female
<input name="gender" type="radio" <?=(isset($gender) && 
($gender=="male"))?"checked":""?> value="male">Male
<?php echo $genderError;?>


<input class="submit" name="submit" type="submit" value="Submit">
</form>
</div>
</body>
</html>

Answer 2

请尝试以下操作，在输入中显示错误和正确的值，而不是删除它们：

<!DOCTYPE html>
<html>
<head>
<title>Form Validation with PHP - Demo Preview</title>
<style>
.error{
    color:red
}
</style>
</head>
<body>
<?php
// Initialize variables to null.
$nameError ="";
$emailError ="";
$genderError ="";
$passwordError ="";


//kur shtypim butonin submit
if(isset($_POST['submit'])){

    $name = $_POST['emri'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    $gender = $_POST['gender'];

    //ne rast se emri eshte bosh  
    if (empty($name)) {
        $nameError = "Vendosni emrin";
    } 

    // emri permban vetem shkronja dhe hapesira
    if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
        $nameError = "Lejohen vetem shkronja dhe hapesire te bardha";
    }

    //ne rast se email eshte bosh
    if (empty($email)) {
        $emailError = "Vendosni email";
    } 

    // pattern email
    if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
        $emailError = "Format i pavlefshem email";
    }


    if(empty($password)){
        $passwordError="Vendosni password";
    }

    //pattern password
    if(!preg_match("/^\w{6,10}$/", $password)){
        $passwordError="Passwordi duhet te jete 6 deri ne 10 karaktere"; 
    }

    if (empty($gender)) {
        $genderError = "Vendosni gjinine";
    } 
     }
//php code ends here
?>

    <h2>Form Validation with PHP.</h2>

    <form action="Ushtrimi3_2014.php" method="post">
    <h2>Form</h2>

        Emri:
        <input name="name" type="text" value="<?php (isset($name)) ? echo $name : '';?>">
        <?php echo $nameError;?>
        E-mail:
        <input name="email" type="text" value="<?php (isset($email)) ? echo $email: '';?>">
        <?php echo $emailError;?>
        Password:
        <input name="password" type="text" value="<?php (isset($password)) ? echo $password: '';?>">
        <?php echo $passwordError;?>
        Gender:
        <input name="gender" type="radio" value="female" <?php (isset($gender) && $gender == 'female') ? echo selected: '';?>>Female
        <input name="gender" type="radio" value="male" <?php (isset($gender) && $gender == 'male') ? echo selected: '';?>>Male
        <?php echo $genderError;?>

        <input class="submit" name="submit" type="submit" value="Submit">
        </form>
    </div>
</body>
</html>

php上的表单验证无效

2 个答案: