PHP登录和注册表单错误处理

Question

我想在PHP和HTML中做一个很好的错误消息，就像我们在bootstrap代码中做的那样，而不是在echo（）中显示消息。 但我不想使用任何功能来制作它。

<?php 
include 'condb.php';


if (isset($_POST['sub'])) {

$name = $_POST['name'];
$lname =$_POST['lname'];
$email =$_POST['email']; 
$pass1 =$_POST['pass1'];
$pass2 =$_POST['pass2'];
if (empty($name) || empty($lname) || empty($email) || empty($pass1) || 
empty($pass2)) {
    echo "<p class='alert alert-danger'> must fill all </p>";
}else{

if (empty($pass1) || empty($pass2)) {
echo "you must fill password";

 }
else{

if ($pass1 == $pass2) {
    $hashpass = md5($pass1);

    $query="insert into users values (null, '$name', '$lname', '$email', 
'$hashpass')";
    $result=mysqli_query($conn,$query);

    echo "success";

}else{
    echo "passwords must be same";
}

}
}
}

?>

Answer 1

将消息存储在session变量中，如$_SESSION["errormsg"]='you must fill password';

现在你可以在HTML中回显会话变量的内容了

<div id='alert_msg'><?php if(isset($_SESSION["errormsg"])){ echo $_SESSION["errormsg"]; }?></div> 

不要忘记在脚本开头包含session_start()并在打印内容后取消设置会话，否则它会反复显示完全相同的内容。

// remove all session variables
 session_unset(); 

 // destroy the session 
 session_destroy(); 

Answer 2

如果你在不同的页面工作，一个是纯PHP而另一个是嵌入HTML，你在php页面中创建会话并在会话中保存你的值并在html页面中使用会话。

<?php 
include 'condb.php';
session_start();
if (isset($_POST['sub'])) {

$name = $_POST['name'];
$lname =$_POST['lname'];
$email =$_POST['email']; 
$pass1 =$_POST['pass1'];
$pass2 =$_POST['pass2'];
if (empty($name) || empty($lname) || empty($email) || empty($pass1) || 
empty($pass2)) {
    $_SESSION["errormsg"]='you must fill password';
}else{

if (empty($pass1) || empty($pass2)) {
 $_SESSION["errormsg"] = "you must fill password";
 }
else{

if ($pass1 == $pass2) {
    $hashpass = md5($pass1);

    $query="insert into users values (null, '$name', '$lname', '$email', 
'$hashpass')";
    $result=mysqli_query($conn,$query);

    echo "success";

}else{
    $_SESSION["errormsg"] = "passwords must be same";
}

}
}
}

?>

在您的HTML代码中使用上面的会话。

<div id='alert_msg'><?php if(isset($_SESSION["errormsg"])){ echo $_SESSION["errormsg"]; }?></div> 

Answer 3

创建一个像messages.php这样的单独文件，并将其包含在您的代码中，如header.php或您想要的单独页面中。

现在在该message.php文件中，您可以定义所需的所有消息，以后更容易更改和更新它们。 更容易在任何地方使用它们

例

define("ADVANCE_ADDED","Advance detail has been added successfully.");
define("ADVANCE_UPDATED","Advance detail has been updated successfully.");
define("ADVANCE_REMOVED","Advance detail has been removed successfully.");
define("APPROVE_LV_MSG","Are you sure you want to approve this leave?");
define("LV_APPROVED","You have approved the leave successfully.");
define("LV_REJECTED","You have rejected the leave successfully.");