PHP image upload to mysql issue - only showing part of the image

Question

I'm pretty sure my code is correct. The issue I have is that, when viewing the image, there is only some of the image that is showing. I think it has something to do with my database that i'm uploading to, but I can't figure out what

Here is my code:

form for the upload

    <form id="form2" method="post" name="postForm" action="post.php" enctype="multipart/form-data">
<h2>Post News here</h2>
<p>Title:</p>
<input type="text" required placeholder="Enter a title" maxlength="30" name="postTitle">
<p>Body:</p>
<input type="textarea" required placeholder="Enter a body" maxlength="250" name="postBody">
<p>Link/ Reference:</p>
<input type="text" required placeholder="Enter a link or reference" maxlength="100" name="postLinkRef">
<p>Image to upload:</p>
<input type="file" name="imageTest">
<p><input type="submit" value="Submit" name="submit"></p>
</form>

inserting the image

<?php
$host = "localhost";
$userName = "root";
$password = "password";
$db = "userdata";

$connect = mysqli_connect($host,$userName,$password, $db);


if($connect)
{
    if(isset($_POST['submit']) && isset($_FILES['imageTest']))
        {
        $postTitle = mysqli_real_escape_string($connect,$_POST['postTitle']);
        $postBody = mysqli_real_escape_string($connect,$_POST['postBody']);
        $postLink = mysqli_real_escape_string($connect,$_POST['postLinkRef']);
        //address, postcode
        //admin priveleges for scertain accounts
        //wont allow me to use $_FILES and i dont know why...
        $postImageName = mysqli_real_escape_string($connect, $_FILES['imageTest']['name']); 
        $postImageData = mysqli_real_escape_string($connect, file_get_contents($_FILES["imageTest"]["tmp_name"]));
        $postImageType = mysqli_real_escape_string($connect, $_FILES["imageTest"]["type"]);
        $sql = "INSERT INTO news(title, body, link, imageName, imageData) VALUES('$postTitle','$postBody','$postLink','$postImageName','$postImageData')";
        if(mysqli_query($connect, $sql))
        {
            echo "Your post has been uploaded\n\n";
            echo "Thank you for your post $testUserName\n\n";
            echo "<a href='index.php'>Got to your news </a>";
        }
        else
        {
            echo "Sorry, something went wrong!! Check to make sure the image your are uploading is a jpeg image (not any other file)!";
        }
        }
        mysqli_close($connect);
}
else
{
    echo "Fail connection";
}
?>

Showing the image

<?php

$host = "localhost";
$userName = "root";
$password = "password";
$db = "userdata";

$connect = mysqli_connect($host,$userName,$password, $db);

    if(isset($_GET['postID']))
    {
        $id = mysqli_real_escape_string($connect, $_GET['postID']);
        $q = "SELECT * FROM news WHERE postID = $id";
        $r = mysqli_query($connect, $q);
        if(mysqli_num_rows($r)==1)//id found in the table
        {
            $row = mysqli_fetch_assoc($r);
            $imageData = $row["imageData"];
        }
        header("Content-type:image/jpeg");
        echo $imageData;
    }
    else
    {
        echo "error";
    }
?>

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