This is the interface,

 & lt; body> 
 
 
<script> 
Var username=document. QuerySelector (" # username "); 
Var iphone=document. QuerySelector (" # iphone "); 
Var text=document. QuerySelector (" text "); 
Username. AddEventListener (" blur ", function () {
Var value=https://bbs.csdn.net/topics/username.value; 
MyAjax ({
Url: "checktext2. PHP," 
Datatype: "text", 
Data: {value 
 username:}, 
Success: the function (result) {
The text. The innerHTML=the result; 
} 
}) 
}) 
</script> 

Below is a PHP file:

 & lt; ? PHP 
$username=$_GET [' username ']; 
If ($username) {
Echo "ok". die(); 
} 
?> 

Ajax I am using encapsulation, I tested the status and the readystate, a 200 a 4,
Found the output HTML interface is the responseText,
This is the testing interface:

CodePudding user response:

Direct access to the browser checktext2. PHP? The username=XXX and see what is the output

CodePudding user response:

You this is the form is submitted, remove the form tag