HTML form $_POST not being retrieve and set into PDO QUERY - php

Question

I decided to leave in all the code to make it less confusing to those who see this.
On line #57, the only form on this page, I'm trying to $_POST the id that equals the post_iD.
Everything uploads correctly to MySQL besides the post_iD.
I always get a Notice: Undefined index: post_iD on $post_iD = $_POST['post_iD']; inside the if(isset($POST['comment'])).
I'm sure the issue is with how I'm trying to retrieve the post_iD inside the form, and not any issues with the PDO but html as PDO the data is being inserted correctly besides the post_iD which I have mentioned.
I'm using post_iD to loop posts from database, it works besides inside the form, any enlightenment with this issue?
Code Below.
if(isset($_POST['comment'])){
$comment = $_POST['comment'];
$post_iD = $_POST['post_iD'];
$data = $Wall->Insert_Comment( $uiD, $post_iD, $comment, $_SERVER['REMOTE_ADDR'] );
}
if ( $updatesarray ){
foreach ($updatesarray as $data){
$post_iD = $data['post_iD'];
$orimessage = $data['message'];
$message = tolink(htmlcode($data['message']));
$time = $data['created'];
$mtime = date("g:i", $time);
$username = $data['username'];
$uploads = $data['uploads'];
$uiD = $data['uid_fk'];
?>
<div class="wrap">
<div class="item" id="stbody<?php echo $post_iD;?>">
<div class="loop-post">
<div class="loop-post-content">
<div class="loop-post-image">
<a href="" class="post-link">
<?php
if ($uploads){
$s = explode(",", $uploads);
foreach ($s as $a){
$newdata = $Wall->Get_Upload_Image_Id($a);
if ($newdata) echo "<a href='uploads/" . $newdata['image_path'] . "' rel='facebox'>
<img src='uploads/" . $newdata['image_path'] . "' width='520' height='245' class='imgpreview attachment-top_story_post wp-post-image' /></a>";
}
echo "</div>";
}
?>
</a>
</div>
<div class="loop-post-byline">By <a rel="author" title="Posts by Emil Protalinski" href=""><?php echo $username;?></a>
<span class="date"> — <?php echo $mtime;?></span>
</div>
<a class="post-link">
<?php echo clear($message);?>
</a>
<div class="post_comment">
<?php $x=1; include_once 'load_comments.php'; ?>
<div class="commentupdate" id="commentbox<?php echo $post_iD;?>">
<div class="stcommentimg">
<img src="<?php echo $photo;?>" class="small_face">
</div>
<div class="stcommenttext">
<form method="POST" action="">
<textarea name="comment" class="comment" id="<?php echo $post_iD;?>" value="<?php echo $post_iD;?>"></textarea> #57
<input type="submit" value="comment">
</form>
</div>
</div>
</div>
</div>
</div>
</div>
<?php } } else echo '<h3 id="noupdates">No Updates!</h3>';?>

Answer 1

You are never actually setting the post_iD variable anywhere. If you want to use it in the $_POST array you need to set it in the form first.
<form method="POST" action="">
<input type="hidden" name="post_iD" value="<?php echo $post_iD; ?>" />
<textarea name="comment" class="comment" id="<?php echo $post_iD;?>" value="<?php echo $post_iD;?>"></textarea> #57
<input type="submit" value="comment">
</form>

Answer 2

You need to do this...
<textarea name="comment" class="comment" id="comment-<?php echo $post_iD;?>"></textarea>
<input type="hidden" id="post_iD" name="post_iD" value="<?php echo $post_iD;?>" />
Cuz youre never passing the post_iD anywhere....this will pass it in hidden form...
And the value for your textarea wont be $post_iD, it will likely be a comment/post of some type....I assume you just had that for debugging