php - PHP文本框为空

Question

I has read all the various post on StackOverflow regards this same but that was not helpful ...

当文本框为空或格式无效时，PHP脚本不显示错误警报。我只知道下面提到的空脚本，但是我也不知道如何添加模式错误。

另外，当文本框为空时，为什么不显示错误？请帮忙。请不要将其标记为重复，因为我阅读了各种文章，但同样的问题也就是为什么我发布了主题。请提供完整的脚本帮助。

提前谢谢你。

 <?php
 if(isset($_POST['submit']))
 {
 $name= $_POST['name'];
 if (!($name))
 {
 $m1 = "<Div class="alert">Enter your Name</Div>" ;
 }

 $email= $_POST['email'];
 if (!($email))
 {
 $m2 = "<Div class="alert">Enter Your Email"</Div> ;
 }

 $_SESSION['name'] =$name;
 $_SESSION['email'] =$email;
 $_SESSION['otp']=$rndno;
 header( "Location: next-page.php" ); 
} 
?>

在HTML正文中

<div>
<?php if(isset($m1)) { echo $m1; } ?>
<?php if(isset($m2)) { echo $m2; } ?>
</div>

Answer 1

试试这个代码是可运行的

<?php
 if(isset($_POST['submit']))
 {
 $name= $_POST['name'];
 if ( $name == '')
 {
 echo $m1 = "<script type='text/javascript'>alert('Please Enter Your Name');</script>" ;
 }

 $email= $_POST['email'];
 elseif ( $email == '')
 {
 echo $m2 = "<script type='text/javascript'>alert('Enter Your E-mail');</script>" ;
 }

 $_SESSION['name'] =$name;
 $_SESSION['email'] =$email;
 $_SESSION['otp']=$rndno;
else{
 header( "Location: next-page.php" ); 
}
}

?>