PHP ???? ?? AJAX ? MYSQL ??
?? ???? ????? AJAX? ?? ???????? ??? ?? ??? ?????.
?? ??????? ???? ???? ???.
??? ??
?? ?? ?? ??? ???? html ???? ?????.
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<script>
function showUser(str){
if (str==""){
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest){
// IE7+, Firefox, Chrome, Opera, Safari 瀏覽器執(zhí)行代碼
xmlhttp=new XMLHttpRequest();
}else{
// IE6, IE5 瀏覽器執(zhí)行代碼
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","demo.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
<select name="users" onchange="showUser(this.value)">
<option value="">Select a person:</option>
<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>
<br>
<div id="txtHint"><b>Person info will be listed here.</b></div>
</body>
</html>? ??? ??? ?? ??.php? ????? ???.
??: showUser () ??? ?? ??? ?????.
???? ?????? ??
XMLHttpRequest ?? ??
?? ??? ???? ???? ?? ??
??? ??? ????.
? ?? ??? ?????? ??? ??? ??? URL ?? ??? ????(q)? ?????.
???? deno.php ??? ???? ??? ??? ????.
<?php
$q=$_GET["q"];
$con = mysqli_connect('localhost','root','root','test');
if (!$con){
die('Could not connect: ' . mysqli_error($con));
}
mysqli_select_db($con,"ajax_demo");
$sql="SELECT * FROM user WHERE id = '".$q."'";
$result = mysqli_query($con,$sql);
echo "<table border='1'>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
<th>Hometown</th>
<th>Job</th>
</tr>";
while($row = mysqli_fetch_array($result)){
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['LastName'] . "</td>";
echo "<td>" . $row['Age'] . "</td>";
echo "<td>" . $row['Hometown'] . "</td>";
echo "<td>" . $row['Job'] . "</td>";
echo "</tr>";
}
echo "</table>";
mysqli_close($con);
?>??: JavaScript?? PHP ??? ??? ???? ??? ????
1. PHP? MySQL ??????? ?? ??? ???
2. ??? ???? ????
3. HTML ???? ???? ???? ??? ? "txtHint" ?? ???? ?? ????
??: ? ??? ??? ??? ??? ?? ???? ???. ?? ??? ??? ?????.
??????? ????? ???
