4
我一直在試圖找出一個正確的方法從基於在html下拉菜單上選擇的初始文本 從數據庫中提取信息。PHP,AJAX從HTML選擇自動填充輸入字段?
這裏是我的代碼:
<html>
<head>
</head>
<script src="testjs.js"></script>
<?php
$host = "";
$username = "";
$password = "";
$database = "";
mysql_connect($host, $username, $password);
mysql_select_db($database);
?>
<body>
<form>
<select name="users" onchange="showUser(this.value)">
<option value="">Select a person:</option>
<?php
$Query = mysql_query("SELECT * FROM population");
while ($Rows = mysql_fetch_array($Query))
{
$ID = $Rows['ID'];
$Pop = $Rows['Pop'];
$UniqueID = $Rows['uid'];
echo "<option value=\"$UniqueID\">$Pop</option>";
}
?>
</select>
</form>
<br>
<p>DB ID <input type="text" id="ids" name="ID" ></p>
<p>Population <input type="text" id="content" name="contet" ></p>
<p>Unique ID <input type="text" id="uid" name="uid" ></p>
<div id="GetInformation"><b>Person info will be listed here.</b></div>
</body>
</html>
test.js包含:
function showUser(str)
{
if (str=="")
{
document.getElementById("GetInformation").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("GetInformation").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","getuser.php?q="+str,true);
xmlhttp.send();
}
獲得用戶包括:
<?php
$q=$_GET["q"];
$con = mysql_connect('', '', '');
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("DropDown", $con);
$sql="SELECT * FROM population WHERE uid = '".$q."'";
$result = mysql_query($sql);
while($row = mysql_fetch_array($result))
{
$ID = $row['ID'];
$Pop = $row['Pop'];
$UID = $row['uid'];
?>
<script type="text/javascript">
var ids = '<?php echo json_encode($ID); ?>';
var content = '<?php echo json_encode($Pop); ?>';
var uid = '<?php echo json_encode($UID); ?>';
</script>
<?php }
mysql_close($con);
?>
**警告!**您的代碼包含[SQL注入漏洞](http://en.wikipedia.org/wiki/SQL_injection)。請[切換到PDO](http://php.net/book.pdo)或[mysqli](http://php.net/book.mysqli),以便您可以使用[帶有參數化查詢的預準備語句](http: //en.wikipedia.org/wiki/Prepared_statement)。 – Charles
你真的想要什麼? – thiagoh
@thiagoh我認爲OP希望使用Javascript從我的數據庫中的不同表中獲取信息;將這些變量提交給JavaScript,然後使用Javascript將包含在Javascript字符串中的信息顯示到'' –