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A server side script (PHP) is used to calculate the MD5 hash of a string. If the Request Method is selected as 'Ajax' and if the browser supports Ajax, then Ajax is used; else normal form submission occurs. It is an example of a Cross Browser script with backward compatibility.
| <?php
if($_POST['ajaxreq'] == 1){
echo getString($_POST['str'], 1);
exit;
}
function getString($str, $method){
return "<table border='1' width='100%'><tr><td><b>String : </b></td><td>$str</td></tr><tr><td><b>MD5 Hash : </b></td><td>" . md5($str) . "</td></tr><tr><td><b>Request : </b></td><td>" . ($method ? 'Ajax Request' : 'Normal Request') . "</td></tr></table>" ;
}
?>
<html>
<head>
<title>Simple Ajax MD5 Example</title>
<head>
<script type="text/javascript">
<!--
function ajaxPost(frm){
var req = false;
var self = this;
if(window.XMLHttpRequest) {
self.req = new XMLHttpRequest();
}else{
try{
self.req = new ActiveXObject("MSXML2.XMLHTTP");
}catch(e){
try {
self.req = new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){}
}
}
if(!self.req || frm.ajaxreq[1].checked)return true;
else{
self.req.open("POST", frm.action, true);
self.req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
self.req.onreadystatechange = function() {
if (self.req.readyState == 4) {
update(self.req.responseText);
}
}
self.req.send(getQueryString());
return false;
}
}
function getQueryString() {
return "ajaxreq=1&str=" + escape(document.forms[0].str.value);
}
function update(str){
document.getElementById("result").innerHTML = str;
}
//-->
</script>
</head>
<script language="Javascript">
</script>
<style type="text/css">
body,table,div{font:normal 11px Verdana, Arial,sans-serif;}
.frmTable{border:1px #333 solid;background:#F9F9F9;width:330px;text-align:justify;}
</style>
</head>
<body>
<table style="width:100%;height:100%;">
<tr><td>
<center>
<form method="post" onsubmit="return ajaxPost(this);" action="ajax-test.php">
<table class="frmTable" border="1" cellpadding="3">
<tr><td colspan="2">Enter a string below to get its MD5 hash. If Request Method is selected as 'Ajax' and if the browser supports Ajax, then Ajax is used; else normal form submission occurs.</td></tr>
<tr><td><u><b>Enter String:</b></u></td><td><input name="str" value="<?php echo $_POST['str'];?>" type="text"> <input value="Go" type="submit"></td></tr>
<tr><td><u><b>Request Method</b></u></td><td><input id="ajax" <?php if($_POST['ajaxreq'] != 0)echo 'checked';?> type="radio" value="1" name="ajaxreq"/><label for="ajax">Ajax </label> <input id="normal" <?php if($_POST['ajaxreq'] == 0)echo 'checked';?> type="radio" value="0" name="ajaxreq"/><label for="normal">Normal</label></td></tr>
<tr><td colspan="2"><div id="result"><?php if(isset($_POST['str']))echo getString($_POST['str'], 0);?></div></td></tr>
</table>
</form></center>
</td></tr></table>
</body>
</html> | |
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