CRea un host de archivos

Primero.. 
El formulario para elegir el archivo:

Este es el archivo que yo nombré Index.html
<title>Titulo de la pagina</title> <form action="upload.php" method="post" enctype="multipart/form-data"> <input type="file" name="ufile" /> <input type="submit" value="Upload" /> </form><footer>Powered by<a href='http://creacionesprofesionales.blogspot.com'>Creaciones profesionales</a>

Luego:

Este es el codigo que permite la subida del archivo al servidor, sin él, la pagina anterior no va a ningun lado. Lo llamé upload.php
<?php
//Powered by creaciones profesionales
//The files have a link on a page for downloading
//and filenames are also put in the progress bar so
//the file can be viewed in the browser (ie. PDF files)
//so replace a few characters. Since the file links are
//loaded onto another page via php and filenames
//are displayed, I wanted to use this method instead
//of url_encode() [just looks funny when displayed]

$SafeFile = $HTTP_POST_FILES['ufile']['name'];
$SafeFile = str_replace("#", "No.", $SafeFile);
$SafeFile = str_replace("$", "Dollar", $SafeFile);
$SafeFile = str_replace("%", "Percent", $SafeFile);
$SafeFile = str_replace("^", "", $SafeFile);
$SafeFile = str_replace("&", "and", $SafeFile);
$SafeFile = str_replace("*", "", $SafeFile);
$SafeFile = str_replace("?", "", $SafeFile);

$uploaddir = "uploads/";
$path = $uploaddir.$SafeFile;

if($ufile != none){ //AS LONG AS A FILE WAS SELECTED...

if(copy($HTTP_POST_FILES['ufile']['tmp_name'], $path)){ //IF IT HAS BEEN COPIED...

//GET FILE NAME
$theFileName = $HTTP_POST_FILES['ufile']['name'];

//GET FILE SIZE
$theFileSize = $HTTP_POST_FILES['ufile']['size'];

if ($theFileSize>999999){ //IF GREATER THAN 999KB, DISPLAY AS MB
$theDiv = $theFileSize / 1000000;
$theFileSize = round($theDiv, 1)." MB"; //round($WhatToRound, $DecimalPlaces)
} else { //OTHERWISE DISPLAY AS KB
$theDiv = $theFileSize / 1000;
$theFileSize = round($theDiv, 1)." KB"; //round($WhatToRound, $DecimalPlaces)
}

echo <<<UPLS
<table cellpadding="5" width="300">
<tr>
<td align="Center" colspan="2"><font color="#009900"><b>Upload Successful</b></font></td>
</tr>
<tr>
<td align="right"><b>File Name: </b></td>
<td align="left">$theFileName</td>
</tr>
<tr>
<td align="right"><b>File Size: </b></td>
<td align="left">$theFileSize</td>
</tr>
<tr>
<td align="right"><b>Directory: </b></td>
<td align="left">$uploaddir</td>
</tr>
</table>

UPLS;

} else {

//PRINT AN ERROR IF THE FILE COULD NOT BE COPIED
echo <<<UPLF
<table cellpadding="5" width="80%">
<tr>
<td align="Center" colspan="2"><font color="#C80000"><b>File could not be uploaded</b></font></td>
</tr>

</table>

UPLF;
}
}

?>
por ultimo crea un directorio llamado uploads