Image upload not working - php

Question

I would really like your help.
I would consider myself an intermediate PHP programmer, but I have never used file uploads before.
I have been stuck on this problem for a long time.
This is a simplified version of my code and I'm 99% sure the error lies somewhere in here.
The output is always "The file wasn't an image file."
This is my HTML...
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="file" id ="partyPic"><br/>
<button type="button" onClick="uploadFile()">upload</button>
</form>
This is my PHP...
$image = $_FILES['image']['tmp_name'];
if (!isset($image)){
//Create default image.
}else{
$image = mysql_real_escape_string(file_get_contents($_FILES['image']['tmp_name']));
$name = mysql_real_escape_string($_FILES['image']['name']);
$image_size = getimagesize($_FILES['image']['tmp_name']);
}
if($image_size == FALSE){
echo 'The file wasn\'t an image file.';
}else{
//I have code that successfully uploads stuff to my database.
}
If you could help it would be greatly appreciated.
Thank you,
Rick Ryan

Answer 1

Example Upload from http://www.php.net/manual/en/features.file-upload.post-method.php:
The basic Form:
<!-- The data encoding type, enctype, MUST be specified as below -->
<form enctype="multipart/form-data" action="__URL__" method="POST">
<!-- MAX_FILE_SIZE must precede the file input field -->
<input type="hidden" name="MAX_FILE_SIZE" value="30000" />
<!-- Name of input element determines name in $_FILES array -->
Send this file: <input name="userfile" type="file" />
<input type="submit" value="Send File" />
</form>
The PHP:
<?php
$uploaddir = '/var/www/uploads/';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
echo '<pre>';
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo "File is valid, and was successfully uploaded.\n";
} else {
echo "Possible file upload attack!\n";
}
echo 'Here is some more debugging info:';
print_r($_FILES);
print "</pre>";
?>
The example from the manual.
So you should build apon something like this:
<form enctype="multipart/form-data" action="upload.php" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="30000" />
Send this file: <input name="userfile" type="file" />
<input type="submit" value="Send File" />
</form>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST' && $_FILES['userfile']['error'] == 'UPLOAD_ERR_OK'){
$uploaddir = '/var/www/uploads/';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
list($width, $height, $type, $attr) = getimagesize($_FILES['userfile']['tmp_name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo "File was successfully uploaded.\n";
... Do Database stuff
}
}
?>

Answer 2

Your file input id is partyPic. You should use $_FILES['partyPic'].

Answer 3

Try this:
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="file" name ="image" id="partyPic"><br/>
<button type="button" onClick="uploadFile()">upload</button>
</form>

Answer 4

Use this after uploading your file.
move_uploaded_file($_FILES['image']['tmp_name'], $target);