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How to change password in php using ajax?

Change Password Using Ajax

Table

CREATE TABLE `freeze`.`user` (
`id` INT( 3 ) NOT NULL AUTO_INCREMENT ,
`username` VARCHAR( 30 ) NOT NULL ,
`password` VARCHAR( 50 ) NOT NULL ,
`email` VARCHAR( 50 ) NOT NULL ,
PRIMARY KEY ( `id` )
) ENGINE = INNODB;

When submit button is clicked, ajax function will be called with method as POST, url as ajax.php and sucess message.

Database Connection

File Name : con.php

<?php
$query=mysql_connect("localhost","root","");
mysql_select_db("ajax",$query);

?>

Example :-

File Name : index.php

<?php

include("conn.php");
if(isset($_POST['submit']))
{
$password=mysql_real_escape_string($_POST['password']);
$confirmpasssword=mysql_real_escape_string($_POST['confirmpassword']);
if($password==$confirmpasssword)
{
$insert=("update change_password set password='$confirmpasssword', confirm_password='$confirmpasssword' where username='mahtab'");
$insert1=mysql_query($insert);
echo "<script> alert('Your password is changed');</script>";
}
else
{
echo "<script> alert(Your password is changed);</script>";
}
}
?>

<html>
<head>
<title>Change Password</title>
<script type="text/javascript">
function showUser(str)
{
if (str=="")
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari

xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5

xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","check_password.php?q="+str,true);

xmlhttp.send();
}
</script>

<script type="text/javascript">
function pass()
{
var pwd=document.getElementById("password").value;
var cpwd=document.getElementById("confirmpassword").value;
if(pwd==cpwd)
{
var t1=document.getElementById('pass').innerHTML="Password Match";

/*t1.style.display='block';*/
}
else
{
var t1=document.getElementById('pass').innerHTML="Password does not Match";
/* t1.style.display='block';*/
document.form.password.focus();
}
}
</script>

<style type="text/css">

body
{
}
.table
{
color:#000000;
}
.st
{
color:#FF0000;
}
</style>
</head>
<form id="form" name="form" method="post" action="" onSubmit="return passvali();">
<table width="50%" border="0" cellspacing="0" cellpadding="5" align="center" bgcolor="#C1C1FF">
<tr>
<td colspan="2" align="center"> <h2>Change Password</h2></td>
</tr>
<tr>
<th> Current Password <span style="color:#F00;">*</span></th>
<td><input type="password" name="cur_pwd" class="input"id="oldpassword"placeholder="Enter Current Password" onChange="showUser(this.value)" /></td>
<td> <span class="st" id="txtHint"></span> </td>
</tr>
<tr>
<th>New Password <span style="color:#F00;">*</span></th>
<td><input type="password" name="password" class="input" id="password" placeholder="Enter your Password"/></td>
</tr>
<tr>
<th> Confirm Password <span style="color:#F00;">*</span></th>
<td><input type="password" name="confirmpassword" class="input" id="confirmpassword" placeholder="Enter Confirm Password" onChange="return pass()" /></td>
<td><span id="pass" style="color:#F00;"> </span> </td>
</tr>
<tr>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" name="submit" value="Submit" style="width:80px;" /></td>
</tr>
</table>
</form>

</body>

</html>





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