Php+ajax implementing progress bar radystate each state _php tutorial

Using ajax+php to create a progress bar is actually very simple.

ReadyState = = Status (0,1,2,3,4)

0: The request was not initialized and the open was not called

1: The request has been established, but has not yet been sent, and the send has not been called

2: The request has been sent and is being processed

3: The request is being processed, and a portion of the data in the response is usually callable

4: Complete

var xmlHttp;

function Create ()

if (window. ActiveXObject)

{

XmlHttp = new ActiveXObject ("Microsoft.XMLHTTP");//ie browser

}

else if (window. XMLHttpRequest)

{

XmlHttp = new XMLHttpRequest ();//non-IE browser

}

}

function Request (URL)

{

Xmlhttp.open ("GET", "for.php?id=" +url,true);//true is an asynchronous transfer

Xmlhttp.onreadystatechange = ip985;//response function

Xmlhttp.send (NULL);

}

function ip985 ()

{

if (xmlhttp.readystate==1)

{

document.getElementById (' IP985 '). InnerHTML = "Request established, ready to send ..."; IP985 flag bit

}

if (xmlhttp.readystate==4)
{
var v = xmlhttp.responsetext;//Get content

document.getElementById (' ip985 '). InnerHTML = v;//target page content
}

}

Source: 5D Happy blog: http://www.5DKX.com/

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