Questions about beginner phpajax

Why is phpajax used for help? $. Ajax ({& nbsp; url: 'mycover. php', & nbsp; method: & quot; POST & quot;, & nbsp; data: {arcids: obj. arcid}, & nbsp; questions about php ajax for New su users?
$. Ajax
({
Url: 'mycover. php ',
Method: "POST ",
Data: {arcids: obj. arcid },
Success: function (data)
{
Alert (data );
If (data = "0 ")
{// Succeeded
Alert ('success ');
}
Else
{// Incorrect
Alert ('Incorrect ');
}
}
});

The strange thing is that alert (data) is the original code of mycover. php, not the execution result of mycover. php.

What should I do if I encounter this problem?

------ Solution --------------------
1. mycover. php uses a short tag, but php configuration does not allow
2. low-level errors. you didn't use http to access this program.
------ Solution --------------------
You can insert data into a div or element using js (where you need to use data) so that the running page can display the effect on the browser.