Seniors help younger brother I look at the following code where the wrong

Seniors, help me see where the code is wrong.
When I do not enter a user name or password, why can not prompt the user name or password can not be empty???



<title>User name or password cannot be empty</title>






if (Isset ($_post[' submit ') &&$_post[' submit ']== "login") {
$user =$_post[' user '];
$pass =$_post[' pass ';
if (Empty ($user) | | Empty ($pass)) {
echo " alert (' User name or password cannot be null '); ";
}
}
?>

------Solution--------------------
echo " alert (' User name or password cannot be null '); ";

Wrong writing.

Should be
------Solution--------------------
You are not submitted by post, nature cannot be verified by $_post
------Solution--------------------
1.form without method= "POST"
2. Ought to be Submit"/>
3.echo " alert (' User name or password cannot be null '); "; Should be echo " ";

You can change that.


<title>User name or password cannot be empty</title>






if (Isset ($_post[' submit ') &&$_post[' submit ']== "login") {
$user =$_post[' user '];
$pass =$_post[' pass ';
if (Empty ($user)
------Solution--------------------
Empty ($pass)) {
echo "";
}
}
?>

