php - Browse button for file upload 404 file directory not found -

hi trying create upload section website, have looked @ multiple websites , examples such as:

w3schools

i have found out there multiple ways these can go wrong example mysql injection each due them using $_files["file"]["type"]. have started follow link instead due being php them selves, php documentation

ok point have problem code have @ moment have simple form runs php script check file upload , upload if correct , come invalid if isn't partially working, file uploads if large file 404 file or directory not found error if smaller file size works ideas.

the html form

<form enctype="multipart/form-data" action="upload_file.php" method="post"> <!-- max_file_size must precede file input field --> <input type="hidden" name="max_file_size" value="300000000" /> <!-- name of input element determines name in $_files array --> send file: <input name="userfile" type="file" /> <input type="submit" value="send file" /> 

and php file code

    <?php // in php versions earlier 4.1.0, $http_post_files should used instead // of $_files.  $uploaddir = './';// $uploadfile = $uploaddir . basename($_files['userfile']['name']);  echo '<pre>'; if (move_uploaded_file($_files['userfile']['tmp_name'], $uploadfile)) {     echo "file valid, , uploaded.\n"; } else {     echo "possible file upload attack!\n"; }  echo 'here more debugging info:'; print_r($_files);  print "</pre>";  ?> 

any ideas appreciated or if knows better example use.

the maximum file size may limited in php. in php.ini, check following properties:

upload_max_filesize = 10m post_max_size = 10m 

if makes no change, can try checking memory limit or maximum process time.