我正在尝试调用PHP文件并让它从数据库表('page')返回结果(单个记录的'pageLocation')。然后我想把结果变成一个变量,所以我可以在用html创建图像时使用它。
目前,正在创建图像,但源没有进入,保留了正确大小的默认空图像。
使用Javascript:
// Loads a list of comics created by the user from the database.
function loadComic()
{
var xmlhttp = new XMLHttpRequest();
var getID = '<?php echo $_SESSION["userID"]; ?>';
var url = "loadCom.php?userID="+getID;
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
loadComicJSON(xmlhttp.responseText);
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
// JSON parsing for 'loadComic'.
function loadComicJSON(response)
{
var arr = JSON.parse(response);
var i;
var out = "";
document.getElementById("loadList").innerHTML="";
if (arr.length == 0)
{
//Non-relevant code affecting layout if no comics are found.
}
else
{
out+="<br>";
for(i = 0; i < arr.length; i++)
{
// Gets image source from database.
imgSrc = "";
tempID = arr[i].comicID;
$.post("getCover.php", {'comicID':tempID}, function(result)
{
imgSrc += ("" + result);
}
);
// Creates image item and associated radio button.
out += "<hr><br><img name = '" + ('com' + arr[i].comicID) + "' id='" + ('com' + arr[i].comicID) + "' onclick='resizeThumb(this)' height='100px;' src='" + imgSrc + "'><input name='comicList' type='radio' id='" + arr[i].comicID + "' value='" + arr[i].comicID + "'>" + arr[i].comicName + " </option><br><br>";
}
}
}
</script>
PHP(getCover.php):
<?php
if (isset($_POST["comicID"]))
{
include_once('includes/conn.inc.php');
$checkID = $_POST["comicID"];
$query = ("SELECT FIRST (pageLocation) FROM page WHERE comicID = '$checkID' ORDER BY pageNum");
$result = mysqli_query($conn, $query);
$conn->close();
echo ($result);
}
else
{
$checkID = null;
echo "Error. No comic found.";
}
?>
感谢您提供的任何帮助。
答案 0 :(得分:1)
您需要从结果中获取数据,例如:
$row = $result->fetch_assoc()
另外,是的,Jim G是对的,你需要转义那个POST变量。