[SOLVED] My upload script.

[ted_chou12]

[code]
<form enctype="multipart/form-data" action="" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="100000" />
Choose a file to upload: <input name="uploadedfile" type="file" /><br />
<input type="submit" name=submit value="Upload File" />
</form>
<?php
if(isset($_POST['submit'])){

//checks file extension
$filename = $_POST['MAX_FILE_SIZE'];//I am not sure if I got this part right though, i dont know how to get the filename.
$ext = explode(".", $filename);

if ($ext[1] != "jpg" && $ext[1] != "gif" && $ext[1] != "png" && $ext[1] !="jpeg") //I dont see why this wouldnt work.
{echo "The file you uploaded does not have an image extension!";}

else {
// Where the file is going to be placed
$target_path = "images/photo/";

/* Add the original filename to our target path. 
Result is "uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
$_FILES['uploadedfile']['tmp_name'];

$target_path = "images/photo/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  basename( $_FILES['uploadedfile']['name']).
    " has been uploaded";
} else{
    echo "There was an error uploading the file, please try again!";
}}}
?>
[/code]
it doesnt work, I mean the file extension part, anything i upload (even pictures) it echos the message.

[trq]

Its not logical.

[code=php:0]
if ($ext[1] != "jpg" || $ext[1] != "gif" || $ext[1] != "png" || $ext[1] !="jpeg")
[/code]

Also, be aware that checking a file type by extension allone is not reliable. You should use [url=http://php.net/getimagesize]getimagesize[/url] to see if a file is an image.