How to establish Ajax+PHP quickly
This article mainly explains "how to establish Ajax+PHP quickly". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to build Ajax+PHP quickly".
Brief introduction:
Ajax consists of HTML, JavaScript ™technology, DHTML, and DOM, an excellent way to transform a clumsy Web interface into an interactive Ajax application.
For Ajax, the core object is XMLHttpRequest, and all Ajax operations are inseparable from the operation on this object.
Create a XMLHttpRequest object
For IE browsers:
The copy code is as follows:
XmlHttp = new ActiveXObject ('Microsoft.XMLHTTP')
For other browsers:
The copy code is as follows:
XmlHttp = new XMLHttpRequest ()
Different browsers have different support for XMLHttpRequest objects in javascript, so you need to make a judgment on a case-by-case basis.
XMLHttpRequest object related methods
Open request
The copy code is as follows:
XMLHttpRequest.open (delivery mode, address, whether or not asynchronous request)
Ready for execution
The copy code is as follows:
XMLHttpRequest.onreadystatechange
Get the execution result
The copy code is as follows:
XMLHttpRequest.responseText
A simple example of php+Ajax:
The first is the test.js file:
The copy 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
XmlHttp.send (null)
}
Function byphp () {
Var byphp100=xmlHttp.responseText
Document.getElementById ('php100') [xss_clean] = byphp100
}
Then there is the file that performs the php operation, do.php
The copy code is as follows:
