enctype="multipart/form-data" 

pada form.

"upload.php". 

<form enctype="multipart/form-data" action="upload.php" 
 method="post">
<input type="hidden" name="MAX_FILE_SIZE" 
 value="50000" />
Select a File:<br />
<input type="file" size="20" name="thefile" /><br />
<input type="submit" name="Submit" value="Submit" />
</form>

UPLOAD HANDLER

if(array_key_exists('thefile', $_FILES)) {

// Validate the uploaded file
if($_FILES['thefile']['size'] === 0 
|| empty($_FILES['thefile']['tmp_name'])) {
 echo("<p>No file was selected.</p>\r\n");
} else if($_FILES['thefile']['size'] > 50000) {
 echo("<p>The file was too large.</p>\r\n");
} else if($_FILES['thefile']['error'] !== UPLOAD_ERR_OK) {
 // There was a PHP error
 echo("<p>There was an error uploading.</p>\r\n");
} else {

// Create uploads directory if necessary
if(!file_exists('uploads')) mkdir('uploads');

// Move the file
if(move_uploaded_file($_FILES['thefile']['tmp_name'], 
'uploads/' . $_FILES['thefile']['name'])) {
 echo("<p>File uploaded successfully!</p>\r\n");
} else {
 echo("<p>There was an error moving the file.</p>\r\n");
}

}

}