Ajax+PHP Quick Start and Simple Application Instructions_PHP Tutorial

Introduction:
Ajax consists of HTML, JavaScript™ technology, DHTML and DOM. This outstanding method can transform clumsy web interfaces into interactive Ajax app.

For Ajax, the core object is XMLHttpRequest, and all Ajax operations are inseparable from the operation of this object.
Create XMLHttpRequest object
For IE browser:

Copy the code The code is as follows:

xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');

For other browsers:

Copy code The code is as follows:

xmlHttp = new XMLHttpRequest();

Different browsers support the XMLHttpRequest object in javascript They are different, so you need to make a judgment based on the situation.

XMLHttpRequest object related methods

Open request

Copy code The code is as follows:

XMLHttpRequest.open (delivery method, address, whether to request asynchronously)

Ready for execution

Copy codeThe code is as follows:

XMLHttpRequest.onreadystatechange

Get the execution result

Copy code The code is as follows:

XMLHttpResponseText

A simple php+Ajax example:
First It is the test.js file:

Copy code The code is as follows:

var xmlHttp;
function S_xmlhttprequest(){
if(window.ActiveXObject){
xmlHttp=new ActiveXObject('Microsoft.XMLHTTP');
}else if(window.XMLHttpRequest){
xmlHttp=new XMLHttpRequest();
}
}
function php100(url){
S_xmlhttprequest();
xmlHttp.open("GET","do.php?id="+url,true);
xmlHttp. onreadystatechange=byphp;
byphp100;
}


Then there is the file that performs php operations, do.php

Copy the code

The code is as follows:$id=@$_GET[id];

for($i=1;$i echo $id ;
}


Then the front-end display page, test.html


Copy code

The code is as follows: 1 ||

2 ||

3

http://www.bkjia.com/PHPjc/328102.html

www.bkjia.com

truehttp: //www.bkjia.com/PHPjc/328102.htmlTechArticleIntroduction: Ajax is composed of HTML, JavaScript technology, DHTML and DOM. This outstanding method can transform the clumsy Web The interface is transformed into an interactive Ajax application. For Ajax, the core...