uploading an image using PHP - php

Question

I am making a form in which user can upload data + an image if he likes using jquery ajax and PHP . So far everything works well on the data side, but on the image upload PHP i am having a problem uploading the file to the right location. The query is working fine and submitting the right data to the table. Can you please help me with the image upload. I tried to debug by using a couple of things but so far everything looks right.
here is my php file script:
if(isset($_POST['discussion_title'], $_POST['discussion_subjects'], $_POST['discussion_textarea'])) {
$user_id = (int)$_SESSION['user_id'];
$title = mysql_prep($_POST['discussion_title']);
$link = mysql_prep($_POST['discussion_link']);
$subject = mysql_prep($_POST['discussion_subjects']);
$discussion = mysql_prep($_POST['discussion_textarea']);
$discussion_timestamp = time();
if ($_FILES["discussion_image"]["name"] != "") {
$test = explode(".", $_FILES["discussion_image"]["name"]);
$extension = end($test);
$name = rand(100, 9999999999);
$file_temp = $_FILES['discussion_image']['tmp_name'];
$file_path = 'uploaded_pictures/uploads/' . $user_id . '/'. $name .'.'.$extension;
$file_path = mysqli_real_escape_string($connection, $file_path);
move_uploaded_file($file_temp, $file_path); // move_uploaded_file() is a built in function of PHP
$query = "INSERT INTO discussions_table (user_id, title, link, image_link, subject, discussion, discussion_timestamp) VALUES ($user_id, '$title', '$link', '$file_path', '$subject', '$discussion', $discussion_timestamp)";
//$save_path = "uploaded_pictures/uploads/" . $user_id ."/$user_id.png";
$save_path = 'uploaded_pictures/uploads/' . $user_id . '/'. $name.'.'.$extension;
$save_path_small = "uploaded_pictures/uploads/" . $user_id . "/" . $name.'small.'.$extension;
create_thumbnail($file_path, $save_path, 250, 250); // creates thumbnail for profile picture
create_thumbnail($file_path, $save_path_small, 50, 50); // creates thumbnail for small user picture
var_dump($_FILES['discussion_image']['tmp_name']);
} else {
$query = "INSERT INTO discussions_table (user_id, title, link, subject, discussion, discussion_timestamp) VALUES ($user_id, '$title', '$link', '$subject', '$discussion', $discussion_timestamp)";
}
$result = mysqli_query($connection, $query);
}
and here is the error being given in the alert() because i used var_dump
Warning: move_uploaded_file(uploaded_pictures/uploads/20/499297822.jpg) [function.move-uploaded-file]: failed to open stream: No such file or directory in D:\wamp\www\asserter\widgets\discussion_board_submit.php on line 22
Warning: move_uploaded_file() [function.move-uploaded-file]: Unable to move 'D:\wamp\tmp\php260.tmp' to 'uploaded_pictures/uploads/20/499297822.jpg' in D:\wamp\www\asserter\widgets\discussion_board_submit.php on line 22
Warning: getimagesize(uploaded_pictures/uploads/20/499297822.jpg) [function.getimagesize]: failed to open stream: No such file or directory in D:\wamp\www\asserter\includes\create_thumbnail.php on line 4
Warning: getimagesize(uploaded_pictures/uploads/20/499297822.jpg) [function.getimagesize]: failed to open stream: No such file or directory in D:\wamp\www\asserter\includes\create_thumbnail.php on line 4
string(22) "D:\wamp\tmp\php260.tmp"

Answer 1

ok it worked. Thanks everyone for your help. The problem was with the directory, i should go back ../ to be able to upload the image

Answer 2

How to create directory in php? - Use this to create directories, I have answered over there. It will help you to create directories for multi-user. Later you can get which user has uploaded what all files.
for error Undefined offset : 1 in php you should set the values using isset() for
$src_pos[1] , $new_size[0], $new_size[1], $size[0], $size[1]