I tried the following code from w3schools. When I enter letters in a input txt box, suggestions should get displayed accordingly. However, nothing is getting displayed as suggestion. I'm not able to get the txt value with serialize. In gethint.php, since it is a post request, i changed the original $q=$_GET["q"]; to $q=$_POST["q"]. Can someone tell me on what i'm doing wrong? thank you.
post_example.html
<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function(){
// txt=$("input").val();
txt=$("input").serialize();
$.post("gethint.php",txt,function(result){
$("span").html(result);
});
});
});
</script>
</head>
<body>
<p>Start typing a name in the input field below:</p>
First name:
<input type="text" >
<p>Suggestions: <span></span></p>
</body>
</html>
gethint.php
<?php
// Fill up array with names
$a[]="Anna";
$a[]="Brittany";
$a[]="Cinderella";
$a[]="Diana";
$a[]="Eva";
$a[]="Fiona";
$a[]="Gunda";
$a[]="Hege";
$a[]="Inga";
$a[]="Johanna";
$a[]="Kitty";
$a[]="Linda";
$a[]="Nina";
$a[]="Ophelia";
$a[]="Petunia";
$a[]="Amanda";
$a[]="Raquel";
$a[]="Cindy";
$a[]="Doris";
$a[]="Eve";
$a[]="Evita";
$a[]="Sunniva";
$a[]="Tove";
$a[]="Unni";
$a[]="Violet";
$a[]="Liza";
$a[]="Elizabeth";
$a[]="Ellen";
$a[]="Wenche";
$a[]="Vicky";
//get the q parameter from URL
$q=$_POST["q"];
//lookup all hints from array if length of q>0
if (strlen($q) > 0)
{
$hint="";
for($i=0; $i<count($a); $i++)
{
if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q))))
{
if ($hint=="")
{
$hint=$a[$i];
}
else
{
$hint=$hint." , ".$a[$i];
}
}
}
}
// Set output to "no suggestion" if no hint were found
// or to the correct values
if ($hint == "")
{
$response="no suggestion";
}
else
{
$response=$hint;
}
//output the response
echo $response;
?>
i think you are missed, the q in your line
$.post("gethint.php",txt,function(result){
should be
$.post("gethint.php", {q: txt},function(result){
or if you are using serialize then use the name of the input box like
<input type="text" name="q" >
The input doesn't have a name, so when you serialize it you get an empty string back.