我将复选框值存储在字段名称tagpost中，并将其保存为tag1，tag2，tag3，tag4，现在我已经管理获取它们：
$tg = $row['tagpost '];
$tg1 = explode(',', $tg);
$tg2 = implode(" ",$tg1);
但我现在面临的问题是如何保持选定的值？
以下是表单中的php部分：
<?php //include config
require_once('../includes/config.php');
//if not logged in redirect to login page
if(!$user->is_logged_in()){ header('Location: login.php'); }
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Admin - Edit Post</title>
<link rel="stylesheet" href="../style/normalize.css">
<link rel="stylesheet" href="../style/main.css">
<script src="//tinymce.cachefly.net/4.0/tinymce.min.js"></script>
<script>
tinymce.init({
selector: "textarea",
plugins: [
"advlist autolink lists link image charmap print preview anchor",
"searchreplace visualblocks code fullscreen",
"insertdatetime media table contextmenu paste"
],
toolbar: "insertfile undo redo | styleselect | bold italic | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | link image"
});
</script>
<script type="text/javascript">
function delete_id_img(id)
{
if(confirm('Do you really want to delete this image?'))
{
window.location.href='edit-post.php?act=deleteimg&id='+id;
}
}
</script>
</head>
<body>
<div id="wrapper">
<?php include('menu.php');?>
<p><a href="./">Blog Admin Index</a></p>
<h2>Edit Post</h2>
<?php
//if form has been submitted process it
if(isset($_POST['submit'])){
$_POST = array_map( 'stripslashes', $_POST );
//collect form data
extract($_POST);
//very basic validation
if($postID ==''){
$error[] = 'This post is missing a valid id!.';
}
if($postTitle ==''){
$error[] = 'Please enter the title.';
}
if($postCat ==''){
$error[] = 'Please select category.';
}
if($postDesc ==''){
$error[] = 'Please enter the description.';
}
if($postCont ==''){
$error[] = 'Please enter the content.';
}
if(!isset($error)){
$st = "SELECT * FROM blog_posts WHERE postID = :postID";
$st = $db->prepare($st);
$st->bindParam(':postID', $postID, PDO::PARAM_STR);
$st->execute();
$rm = $st->fetch();
$count = $st->rowCount();
if($_FILES['file']['name']!='')
{
$file='../uploads/images/'.$rm['postImg'];
@unlink($file);
$tmp_name = $_FILES["file"]["tmp_name"];
$namefile = $_FILES["file"]["name"];
$ext = end(explode(".", $namefile));
$fileUpload = move_uploaded_file($tmp_name,"../uploads/images/".$image_name);
$image_name=time().".".$ext;
watermark_image($tmp_name,"../uploads/images/".$image_name);
$img = ''.$image_name.'';
}else{
$img = $rm['postImg'];
}
try {
$postSlug = slug($postTitle);
//insert into database
$stmt = $db->prepare('UPDATE blog_posts SET postTitle = :postTitle, postImg = :postImg, postYoutube = :postYoutube, postSlug = :postSlug, postDesc = :postDesc, postCont = :postCont, postCat = :postCat WHERE postID = :postID') ;
$stmt->execute(array(
':postTitle' => $postTitle,
':postImg' => $img,
':postYoutube' => $postYoutube,
':postSlug' => $postSlug,
':postDesc' => $postDesc,
':postCont' => $postCont,
':postCat' => $postCat,
':postID' => $postID
));
$seturl = "".$postID."/".$postSlug."";
$qry2 = "UPDATE blog_posts SET postSlug = :postSlug WHERE postID = :postID";
$statement = $db->prepare($qry2);
$statement->bindParam(':postSlug', $seturl);
$statement->bindParam(':postID', $postID);
$statement->execute();
//redirect to index page
header('Location: edit-post.php?id='.$postID.'');
exit;
} catch(PDOException $e) {
echo $e->getMessage();
}
}
}
?>
<?php
//check for any errors
if(isset($error)){
foreach($error as $error){
echo $error.'<br />';
}
}
try {
$stmt = $db->prepare('SELECT postID, postTitle, postImg, postYoutube, postDesc, postCont, postYoutube, postTag, postCat FROM blog_posts WHERE postID = :postID') ;
$stmt->execute(array(':postID' => $_GET['id']));
$row = $stmt->fetch();
$tg = $row['postTag'];
$tg1 = explode(',', $tg);
$tg2 = implode(',', $tg1);
} catch(PDOException $e) {
echo $e->getMessage();
}
?>
<?php
$act = $_REQUEST['act'];
$id = $_REQUEST['id'];
if($act == "deleteimg")
{
//$qry = "SELECT * FROM article where id IN(".$id.")";
//$result = mysql_query($qry);
$qry = "SELECT * FROM blog_posts WHERE postID IN(:postID)";
$stmt = $db->prepare($qry);
$stmt->bindParam(':postID', $id);
$stmt->execute();
while( $row = $stmt->fetch())
{
$file='../uploads/images/'.$row['postImg'];
@unlink($file);
}
//$sqlAdd ="update article set ne_image = '' where id IN(".$id.")";
//mysql_query($sqlAdd);
$qr = "UPDATE blog_posts SET postImg = '' WHERE postID IN(:postID)";
$statement = $db->prepare($qr);
$statement->bindParam(':postID', $id);
$statement->execute();
//header("Location:post-article.php?id=".$id."");
header('Location: edit-post.php?id='.$id.'');
}
?>
<?php
//show message
if(isset($_GET['action'])){
echo '<h3>Post '.$_GET['action'].'.</h3>';
}
?>
<?php if(!empty($row['postImg'])){ echo '<img src="../uploads/images/'.$row['postImg'].'"><br/><a href="javascript:delete_id_img('.$row['postID'].')">Delete</a><br/>'; }else{ echo'<br/>'; }
?>
<?php if(!empty($row['postYoutube'])){ echo '<iframe width="720" height="450" src="http://www.youtube.com/embed/'.$row['postYoutube'].'"></iframe><br/><br/>'; }else{ echo'<br/>'; }
?>
<form action='' method='post' enctype="multipart/form-data">
<input type='hidden' name='postID' value='<?php echo $row['postID'];?>'>
<p><label>Title</label><br />
<input type='text' name='postTitle' value='<?php echo $row['postTitle'];?>'></p>
<p><label>Category</label><br />
<select name="postCat">
<option value="" selected="selected" disabled="disabled">Select Category</option>
<?php
$stmt = $db->prepare('select * from blog_categories');
$stmt->execute();
$rc = $stmt->fetchAll();
foreach($rc as $rows){
?>
<option value="<?php echo $rows['catUrl']; ?>" <?php if($row['postCat'] == ''.$rows['catUrl'].'') echo 'selected="selected"'; ?>><?php echo $rows['catName']; ?></option>
<?php
}
?>
</select>
</p>
<?php if(!empty($row['postYoutube'])){
?>
<?php
}else{
?>
<p><label>Image</label><br />
<input type="file" name="file" id="file"/> </p>
<?php
}
?>
<?php if(!empty($row['postImg'])){
?>
<?php
}else{
?>
<p><label>Youtube Video ID</label><br />
<input type="text" name="postYoutube" id="postYoutube" placeholder="Video ID e.g. lQem15Ow6hw" value="<?php echo $row['postYoutube'];?>" /> </p>
<?php
}
?>
<p><label>Description</label><br />
<textarea name='postDesc' cols='60' rows='10'><?php echo $row['postDesc'];?></textarea></p>
<p><label>Content</label><br />
<textarea name='postCont' cols='60' rows='10'><?php echo $row['postCont'];?></textarea></p>
<br/>
<p><label>Tags <small></small></label><br /><br />
<?php
$stmt = $db->prepare('select * from blog_tag');
$stmt->execute();
$rt = $stmt->fetchAll();
foreach($rt as $rtg){
?>
(<input type="checkbox" name="postTag[]" value="<?php echo $tg2; ?>" <?php if(in_array($rtg['tagurl'],$tg1)){ echo 'checked="checked"'; } ?>> <?php echo $rtg['tagName']; ?>) ,
<?php
}
?>
<br/>
<p><input type='submit' name='submit' value='Update'></p>
</form>
</div>
</body>
</html>
上面的代码从blog_tags中提取所有标记名称，并尝试将其与帖子中的tagpost进行比较。
答案 0 :(得分：0)
简单使用IN_ARRAY <?= (in_array($rtg['tagName'],$tg1))? 'checked="checked"' : "" ?>
$tg = $row['tagpost'];
$tg1 = explode(',', $tg);
..........
foreach($rt as $rtg){
?>
<input type="checkbox" name="postTag[]" value="<?php echo $rtg['tagurl']; ?>" <?php if(in_array($rtg['tagurl'],$tg1)){ echo 'checked="checked"'; } ?> > <?php echo $rtg['tagName']; ?>
<?php
}