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PHP 和 AJAX MySQL 数据库实例 (总结)

2014-10-30 10:57 531 查看

js查询mysql数据库中间件php

html中加载js代码，用js打开php文件，调用php查询数据库的数据。（前台页面，可以将html和js放在一个文件里html内写具体js）

01.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
<script src="selectuser.js"></script>
</head>
<body>

<form>
Select a User:
<select name="users" onchange="showUser(this.value)">
<option value="1">Peter Griffin</option>
<option value="2">Lois Griffin</option>
<option value="3">Glenn Quagmire</option>
<option value="4">Joseph Swanson</option>
</select>
</form>

<p>
<div id="txtHint"><b>User info will be listed here.</b></div>
</p>

</body>
</html>

selectuser.js

var xmlHttp

function showUser(str)
{
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
}
var url="getuser.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;
}

getuser.php

<?php
header("Content-type:text/html;charset=utf8");
$q=$_GET["q"];

$con = mysql_connect('localhost', 'root', '');
if (!$con)
{
die('Could not connect: ' . mysql_error());
}

mysql_select_db("t2ecmall", $con);
mysql_query("set names utf8");

$sql="SELECT * FROM ecm_acategory ";

$result = mysql_query($sql);

echo "<table border='1'>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
<th>Hometown</th>
</tr>";

//$row=mysql_fetch_array($result))!==false
//$row = mysql_fetch_array($result)
while($row=mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row['cate_id'] . "</td>";
echo "<td>" . $row['cate_name'] . "</td>";
echo "<td>" . $row['parent_id'] . "</td>";
echo "<td>" . $row['code'] . "</td>";
echo "</tr>";
}
echo "</table>";

mysql_close($con);
?>

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