这可能非常简单,但是对于php和js来说我真的很新 我为我的网站创建了一个评论系统,但是我有一个无法解决的问题
//comment section
$commentsArray = array();
$commentQuery_run = mysqli_query($con, "SELECT * FROM comments WHERE PostID='$userPostId'");
if (mysqli_num_rows($commentQuery_run) > 0) {
echo "<b id='commcount'>Comments:".mysqli_num_rows($commentQuery_run).
"</b>";
while ($commentRow = mysqli_fetch_assoc($commentQuery_run)) {
$commentID = $commentRow['id'];
$commentUsername = $commentRow['username'];
$commentUserPfpPath = $commentRow['path'];
$commentContent = $commentRow['text'];
$commentDate = $commentRow['date'];
$commentsArray[] = $commentContent;
echo "html for displaying the comments";
}
} else {
echo "<b id='commcount'>No comments! Be the first one to comment!</b>";
}
if ($isLoggedIn === true) {
echo "<form id='commForm' method='POST' action=''> <
input id = 'commTextInp'
type = 'text'
placeholder = 'Your comment...'
name = 'commentText' > < br >
<
input id = 'commSubmInp'
type = 'submit'
name = 'commentSubmit'
value = 'Post Comment' >
<
/form>";
} else {
echo "<b id='commcount'>Please Login In to comment!</b>";
}
//comment section
//coment process
if (isset($_POST['commentSubmit'])) {
if (isset($_POST['commentText']) && !empty($_POST['commentText'])) {
$postCommentUsername = $_SESSION['username'];
$postCommentPfpImg = $_SESSION['pfpimg'];
$postCommentContents = mysqli_real_escape_string($con, htmlentities($_POST['commentText'], ENT_QUOTES));
$postCommentDate = date("d/m/Y H:i");
if (!in_array($postCommentContents, $commentsArray)) {
$postCommentQuery_run = mysqli_query($con, "INSERT INTO comments VALUES('','$userPostId','$postCommentUsername','$postCommentPfpImg','$postCommentContents','$postCommentDate')");
if ($postCommentQuery_run === true) {
echo "<script> window.location.reload() </script>";
} else {
echo "<b style='color:red;'>Error while submitting comment!</b>";
}
} else {
echo "<b style='color:red;'>Please don't repeat yourself/other users!</b>";
}
} else {
echo "<b style='color:red;'>Please write something in your comment and try again</b>";
}
}
echo "</center>";
//comment process
每次我提交表格时,都会出现“请不要重复自己/其他用户”错误。为什么? window.location.reload()函数还会重新提交表单吗?还是我做错了什么?有没有更好的方法可以重新加载网站?很显然,我需要重新加载页面,以便显示新评论。再次,对php / js / html来说,我真的是新手,所以请解释为什么我的代码无法按预期的方式工作。我的猜测是reload()方法重新提交表单(对不起,我的英语不好)
答案 0 :(得分:1)
最好将POST处理代码放在文件的标头中,这样您就可以使用header()重定向了。要显示错误,可以使用一些标志;看到:
// here we store all our comments
$commentsArray = [];
$commentQuery_run = mysqli_query($con,"SELECT * FROM comments WHERE PostID='$userPostId'");
while($commentRow = mysqli_fetch_assoc($commentQuery_run)){
$commentsArray[] = $commentRow;
}
//coment process
if(isset($_POST['commentSubmit'])){
if(isset($_POST['commentText']) && !empty($_POST['commentText'])){
$postCommentUsername = $_SESSION['username'];
$postCommentPfpImg = $_SESSION['pfpimg'];
$postCommentContents = mysqli_real_escape_string($con, htmlentities($_POST['commentText'], ENT_QUOTES));
$postCommentDate = date("d/m/Y H:i");
if(! array_search($postCommentContents, array_column($commentsArray, 'text')) ){
$postCommentQuery_run = mysqli_query($con,"INSERT INTO comments VALUES('','$userPostId','$postCommentUsername','$postCommentPfpImg','$postCommentContents','$postCommentDate')");
if($postCommentQuery_run === true){
header("Location: " . $_SERVER['PHP_SELF']);
}
else {
$is_error = 'ERROR';
}
}
else{
$is_error = 'DUPLICATE';
}
}
else{
$is_error = 'NO_DATA';
}
}
然后在旧位置(页面中间)显示错误:
if(isset($is_error)) {
switch($is_error) {
case 'DUPLICATE':
echo "<b style='color:red;'>Please don't repeat yourself/other users!</b>";
break;
case 'NO_DATA':
echo "<b style='color:red;'>Please write something in your comment and try again</b>";
break;
default:
echo "<b style='color:red;'>Error while submitting comment!</b>";
}
}
// ...........
// PRINT ALL COMMENTS HERE
if(count($commentsArray)>0){
echo "<b id='commcount'>Comments:" . count($commentsArray) . "</b>";
foreach($commentsArray as $comment){
// $comment contains all your db-fields
echo "html for displaying the comments";
}
}
else{
echo "<b id='commcount'>No comments! Be the first one to comment!</b>";
}
答案 1 :(得分:1)
每次我提交表格时,都会出现“请不要重复自己/其他用户”错误。为什么?
if(! in_array($postCommentContents, $commentsArray))
第一条评论为true
,因为:
if(mysqli_num_rows($commentQuery_run) > 0)
第一个评论为false
,而commentsArray
为空。