mysql post missing data from SERVER REQUEST_METHOD - php

Question

I have the following code, whenever I try to insert the data, the $content is not being inserted, where might the problem be? I am using the function test input for security related issues.
<?php
// define variables and set to empty values
$title = $content = $path = $file_type ="";
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
$title = test_input($_POST["title"]);
$content = test_input($_POST["content"]);
$path = test_input($_POST["path"]);
$file_type = test_input($_POST["file_type"]);
}
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
$con=mysqli_connect("localhost","---","---","---");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="INSERT INTO articles (ArtID,Title,Content,Image_VideoLink_Path,file_type)
VALUES
('','$title','$content','$path',' $file_type')";
if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error($con));
}
echo "<h2 >Article Published</h2>";
echo"<a href='../mag/index.php'> View it Now </a>";
mysqli_close($con);
?>
here is the code for the form:
<form method="POST" action="artPro.php">
<fieldset>
<legend>Create New Article</legend>
<br/>
Article Title:
<input type="text" placeholder="enter title here" class="span3" name="title" required>
Image/Video Path :
<input type="text" placeholder="enter image name e.g k.jpg or k.mp4 for video" name="path" class="span3" required/>
File Type :
<input type="text" name="file_type" class="span3" required placeholder="e.g: image or video"/>
<br/>
<label>Article Content:</label>
<textarea name="content" rows="20" class="jqte-test span12" required id="txtmsg"></textarea>
<br><button type="submit" class="btn btn-primary btn-large pull-right">Publish</button>
</fieldset>
</form>

Answer 1

Try this query:
$sql="INSERT INTO articles
(Title,Content,Image_VideoLink_Path,file_type) VALUES
('$title','$content','$path',' $file_type')";
$content was not being inserted because you are giving Article ID. And I am sure that Article ID will your primary key and this will auto incremented. So, you did not need to mention Article id in sql query (statement).