This article mainly introduces php + ajax implementation of the method of refreshing new pages. it describes in detail the creation of databases, the implementation of Ajax files, and the PHP call method, for more information about php + ajax, see the following example. Share it with you for your reference. The specific implementation method is as follows:
This is a paging program instance based on the original ecology of php + js + ajax. we will create a detailed example from the database to js, php, the creation of html pages tells you how to call data by ajax page.
The procedure is as follows:
1. create a database
The SQL statement is as follows:
The code is as follows:
Create table 'TB _ user '(
'Id' int (10) not null auto_increment,
'Username' varchar (50) not null,
Primary key ('id ')
) ENGINE = MyISAM default charset = utf8 AUTO_INCREMENT = 10;
Insert into 'TB _ user' VALUES (1, 'AAA ');
Insert into 'TB _ user' VALUES (2, 'BBB ');
Insert into 'TB _ user' VALUES (3, 'CCC ');
Insert into 'TB _ user' VALUES (4, 'ddd ');
Insert into 'TB _ user' VALUES (5, 'Eee ');
Insert into 'TB _ user' VALUES (6, 'fff ');
Insert into 'TB _ user' VALUES (7, 'GGG ');
Insert into 'TB _ user' VALUES (8, 'hhh ');
Insert into 'TB _ user' VALUES (9, '�� ');
II. the ajaxpage. js file code is as follows:
The code is as follows:
Var http_request = false;
Function send_request (url) {// initialization, specifying the processing function and sending the request function
Http_request = false;
// Start initializing the XMLHttpRequest object
If (window. XMLHttpRequest) {// Mozilla browser
Http_request = new XMLHttpRequest ();
If (http_request.overrideMimeType) {// sets the MIME category
Http_request.overrideMimeType ("text/xml ");
}
}
Else if (window. ActiveXObject) {// IE browser
Try {
Http_request = new ActiveXObject ("Msxml2.XMLHttp ");
} Catch (e ){
Try {
Http_request = new ActiveXobject ("Microsoft. XMLHttp ");
} Catch (e ){}
}
}
If (! Http_request) {// exception. An error occurred while creating the object instance.
Window. alert ("An error occurred while creating the XMLHttp object! ");
Return false;
}
Http_request.onreadystatechange = processrequest;
// Determine the request sending method, URL, and whether to execute the following code synchronously
Http_request.open ("GET", url, true );
Http_request.send (null );
}
// Function for processing the returned information
Function processrequest (){
If (http_request.readyState = 4) {// judge the object status
If (http_request.status = 200) {// The message is returned successfully. start to process the information.
Document. getElementById (reobj). innerHTML = http_request.responseText;
}
Else {// The page is abnormal.
Alert ("the page you requested is abnormal! ");
}
}
}
Function dopage (obj, url ){
Document. getElementById (obj). innerHTML = "reading data ...";
Reobj = obj;
Send_request (url );
}
III. php call code:
The code is as follows:
PHP + ajax paging demonstration