How to debug query regarding $_FILES especially file inputs? - php

Question

I had this query using php in inserting images after submitting the form It says "Requirements submitted succesfully" but there is no data inserted in database.
This is my code so far:
if(isset($_POST['sumit'])){
$count = count($_FILES);
$query = "SELECT * FROM dummyclients_tbl WHERE user_id = '".$_SESSION['user']."'";
if (!$result = mysql_query($query)) {
exit(mysql_error());
}
if(mysql_num_rows($result)){
$row = mysql_fetch_assoc($result);
$sid = $row['user_id'];
$coll =$row['college'];
$stat = "Pending";
$query = "INSERT INTO request_tbl (user_id,document_id,imgreq1,imgreq2,imgreq3,imgreq4,imgreq5,imgreq6,imgreq7,request_status,college) VALUES ('$sid','$passed_id'";
for($i = 1; $i <= $count; ++$i){
if(is_uploaded_file($_FILES['imgreq'.$i]['tmp_name']) && $_FILES['imgreq'.$i]['size']){
$query .= ",'" . base64_encode(file_get_contents(addslashes($_FILES['imgreq'.$i]['tmp_name']))) . "'";
}else{
$query .= ",NULL";
}
}
$query .= ",'$stat','$coll')";
?>
<script>alert('Requirements Successfully Submitted!');</script>
<?php
// saveimage($query);
}
else{
?>
<script>alert('Error while submitting form!');</script>
<?php
}
}
I dont know where did I go wrong so please if anyone can help I appreciate it. Thanks.

Answer 1

So it is true that I did not execute the query and forgot to put mysql_query($query); after $query .= ",'$stat','$coll')"; . And that lead me to solving another problem wherein I did not set the fields in the database to receive NULL values which is the cause of the error.

Answer 2

after:
$query .= ",'$stat','$coll')";
add
mysql_query($query)