AJAX asp.net paging PHP+AJAX realizes no-refresh registration (with real-time detection of user name)

Many times, we register personal information online. After submitting the page, we always have to wait for the page to refresh to tell us whether the registration is successful. When the network is poor, if we register a large number of things, after a long wait for the page to refresh, Finally, I got the message "Your username has been used" or XXXXXXX is illegal. I think everyone must be very unhappy. Today I will introduce a simple registration procedure that does not refresh the AJAX page and detects user information in real time. I hope it will help Everyone helps. Okay, let’s look at the registration interface code first:







                                                                                                                                                                                                                                          /td>
                                                                 font color = "#FF6633">* It's better not to be all numbers.
                                                                                                                        td width="310" align="center" bgcolor="#FFFFFF">  >* ; 6-16 digits (including 6 and 16), limited to English and numbers.
                                                                                                                          td width="310" align="center" bgcolor="#ffFFFF"> ;* ; The call will start. Now let's look at the code of the ajaxreg.js file contained in the page above, which contains the ajax framework and some judgment functions.Tvar http_request = false;
Function send_request (url) {// Initialization, specify the processing function, the function of sending requests http_request = false; DOW.XMLHTTPREQUEST) {// Mozilla browse Container
        http_request=new XMLHttpRequest();
                                                                                                                                                        }
          else if(window.ActiveXObject){//IE Browser
         try{
                                                                                                                                                 ,,,,, p");
      }catch(e){}
}}} (If (! Http_request) {// Innocent, the failure of the creation objects
Window.alert ("Create XMLHTTP objects failed!"); , and whether to execute the next code synchronously
http_request.open("GET",url,true);
http_request.send(null);
}
//Function that processes the returned information
function processrequest(){
if(http_request. readyState==4){//Determine the object status
if(http_request.status==200){//The information has been returned successfully, start processing the information
document.getElementById(reobj).innerHTML=http_request.responseText;
}
else {//The page is not normal
               alert("The page you requested is not normal! " ); ).innerHTML=" Username cannot be empty! & lt;/font & gt; "";
f.username.focus ();
return false;
}
else {
document.gelementByid (obj) .innerhtml = "Reading data ..."; ST ('Checkuserreg .php?username='+username);
reobj=obj;
}
}
function pwdcheck(obj){
var f=document.reg;
var pwd=f.userpwd.value;
if(pwd== ""){
                                                                                                                                                                                   document.getElementById(obj).innerHTML=" User password cannot be empty! "; nerHTML=" The password length cannot be less than 6 characters! "; Request! ";
}
}
function pwdrecheck(obj){
var f=document.reg;
var repwd=f.reuserpwd.value;
if (repwd==""){
Document.getElementById (obj).innerHTML=" Please enter your password again!";
                                                                               (obj).innerHTML= " The passwords entered twice are inconsistent! "; The input is correct! & lt;/font & gt; ";";
}}

It is not difficult to see that the data is transmitted to Checkuserreg.php asynchronous. Real-time judgment, interested friends can expand the function.Let’s take a look at what checkuserreg.php does:
header('Content-Type: text/html;charset=GB2312');//Avoid garbled output
include('inc/config.inc .php');//Contains basic database configuration information
include('inc/dbclass.php');//Contains database operation classes
$username=trim($_GET['username']);//Gets the registration name
//-------------------------------------------------- ------------------------------------
$db=new db;//Generated from database operation class Example
$db->mysql($dbhost,$dbuser,$dbpassword,$dbname);//Call the connection parameter function
$db->createcon();//Call the create connection function
//--- -------------------------------------------------- ----------------------------------
$querysql="select username from cr_userinfo where username='$username'";// Query the member name
$result=$db->query($querysql);
$rows=$db->loop_query($result);
//If the member name has been registered
//------ -------------------------------------------------- --------------------------
if($rows){
echo" This member name has already been registered , please change your member name! ";
}
//If the member name is not registered, it will be displayed
//----------------------- -------------------------------------------------- ----------
else{
echo" This member name can be registered! ";
}
if($action==reg){
$addsql="insert into cr_userinfo
         values(0,'$username','$userpwd','$time',50,1 ,'$userquestion','$useranswer')";
$db->query($addsql);
echo" Congratulations, registration success! Please clickhereto log in! ";
}
$db->close();//Close the database connection
?>
The comments are quite detailed and everyone should be able to understand them. After checking that the information is legal, we Submit registration information to achieve non-refresh registration PHP code, senduserinfo.php:
header('Content-Type: text/html;charset=GB2312');//Avoid garbled output
include('inc/ config.inc.php');//Contains basic database configuration information
include('inc/dbclass.php');//Contains database operation classes
$username=trim($_GET['username']);// Get the registration name
$userpwd=md5(trim($_GET['userpwd']));//Get the registration password
$time=date("Y-m-d");
//---------- -------------------------------------------------- -----------------------
$db=new db;//Generate an instance from the database operation class
$db->mysql($dbhost,$ dbuser,$dbpassword,$dbname);//Call the connection parameter function
$db->createcon();//Call the create connection function
//---------------- -------------------------------------------------- ------------------
//Start inserting data
//------------------------ -------------------------------------------------- ---------
$addsql="insert into cr_userinfo values(0,'$username','$userpwd','$time',50,1,'$userquestion','$useranswer') ";
$db->query($addsql);
echo" Congratulations, your registration is successful! Please clickhereto log in! ";
$db->close();//Close the database connection
?>
OK!!You're done, let's take a look at the renderings:
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5. How about

? Not bad, I’m exhausted from posting so many, I hope you all like it~~~~

The above introduces the AJAX asp.net paging PHP + AJAX implementation of non-refresh registration (with real-time user name detection), including the content of AJAX asp.net paging. I hope it will be helpful to friends who are interested in PHP tutorials.