How to use Ajax in PHP with JQuery

Ajax is called (Asynchronous JavaScript and XML) , It is used when we want to send data into database or recieve data from database without reloading the whole page.

Example : 

1.  
Promocode in ecommerce website , when user applied promocode in ecommerce website , after successfully applied webpage not reloading just showing coupon applied message to us.
                  
2.  When we want to recieve complete data of employee or patient on behalf of employee id or patient id without page refreshing 
 
There are number of examples in ajax just keep one point in your mind is that when we want data or send data without page reload.

Solution :   

HTML Code : 







Jquery Code : 

$('#selectdata').change(function () {

$enqid = $('#empid').val();

$.ajax({
url:"php page url",
method:"POST",
data:{empid:$empid},
success:function(data)
{
if(data)
{
$('#searchdiv').html(data);
}
else
{

}

}
});

});

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