Ajax: Autosuggest com PHP

0

Posted on : 19-07-2009 | By : Paulo H Oliveira | In : Ajax, PHP

Auto-sugestão de busca (sem banco de dados) utilizando AJAX. O exemplo pode ser utilizado com banco de dados facilmente, bastando vincular a linha de chamada com o indice enviado pelo GET do AJAX.

Arquivo ajax.php:

<html>
<head>
<script>
var xmlHttp
function showHint(str)
{
if (str.length==0)
{
document.getElementById("txtHint").innerHTML="";
return;
}
 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Your browser does not support AJAX!");
return;
}
 
var url="result. php";
url=url+"?q="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
 
function stateChanged()
{
if (xmlHttp.readyState==4)
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
}
}
 
function GetXmlHttpObject()
{
var xmlHttp=null;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
 
// Internet Explorer
 
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
} </script>
 
</head>
<body>
 
<form>
First Name:
<input type="text" id="txt1" onkeyup="showHint(this.value)">
</form>
 
<p>Suggestions: <span id="txtHint"></span></p> 
 
</body>
</html>

Arquivo result.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
 
$q=$_GET["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;
 
?>

Compartilhe :

  • Stumble upon
  • twitter

Escreva um comentário

Security Code: