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ajax 向php发送请求

2015-06-27 16:17 483 查看

[html] view plain copy

<html>

<head>

<script src="clienthint.js"></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>

[html] view plain copy

clienthint.js

[javascript] view plain copy

var xmlHttp

function showHint(str)

{

if (str.length==0)

{

document.getElementById("txtHint").innerHTML=""

return

}

xmlHttp=GetXmlHttpObject()

if (xmlHttp==null)

{

alert ("Browser does not support HTTP Request")

return

}

var url="gethint.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 || xmlHttp.readyState=="complete")

{

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;

}

gethint.php

[php] view plain copy

<?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;

?>

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