Welcome everyone
here you'll learn how to upload files using PHP in a very simple way.
first put the following code in one file (upload.php)
create a directory called (images) or whatever you want "don't forget to change ( $upload_dir = "images/"; ).
CODE
<html>
<head>
<title>Upload File</title>
</head>
<form action="upload.php" method="post" enctype="multipart/form-data">
Browse a File to Upload:<br>
<input type="file" name="filetoupload"><br>
<input type="hidden" name="MAX_FILE_SIZE" value="<?echo $size_bytes; ?>">
<br>
<input type="Submit" value="Upload File">
</form>
<?php
/*
Author: Mohammed Ahmed(M@king)
E-mail: m at maaking dot com
WWW : http://www.maaking.com
*/
//**********************************************************************//
// $_FILES['filetoupload'] is the value of //
// file field from the form. <input type="file" name="filetoupload"> //
//**********************************************************************//
// this is the upload dir where files will go.
//Don't remove the /
//Chmod it (777)
$upload_dir = "images/"; //change to whatever you want.
// files less than 1MB
$size_bytes = 1048576; //bytes will be uploaded
$limit_file_type = "no"; //Do you want to limit the types of files uploaded. (yes/no)
// specify file types.
$allowed_file_type = array('image/gif',
'image/pjpeg',
'image/jpeg',
'image/png',
'image/jpg');
//check if the directory exist or not.
if (!is_dir("$upload_dir")) {
die ("The directory <b>($upload_dir)</b> doesn't exist");
}
//check if the directory is writable.
if (!is_writeable("$upload_dir")){
die ("The directory <b>($upload_dir)</b> is NOT writable, Please Chmod (777)");
}
//Check first if a file has been selected
//is_uploaded_file('filename') returns true if
//a file was uploaded via HTTP POST. Returns false otherwise.
if (is_uploaded_file($_FILES['filetoupload']['tmp_name']))
{//begin of is_uploaded_file
//Get the Size of the File
$size = $_FILES['filetoupload']['size'];
//Make sure that $size is less than 1MB (1000000 bytes)
if ($size > $size_bytes)
{
echo "File Too Large. File must be <b>$size_bytes</b> bytes.";
exit();
}
//check file type
if (($limit_file_type == "yes") && (!in_array($_FILES['filetoupload']['type'],$allowed_file_type)))
{
echo"wrong file type";
exit();
}
// $filename will hold the value of the file name submetted from the form.
$filename = $_FILES['filetoupload']['name'];
// Check if file is Already EXISTS.
if(file_exists($upload_dir.$filename)){
echo "Oops! The file named <b>$filename </b>already exists";
exit();
}
//Move the File to the Directory of your choice
//move_uploaded_file('filename','destination') Moves afile to a new location.
if (move_uploaded_file($_FILES['filetoupload']['tmp_name'],$upload_dir.$filename)) {
//tell the user that the file has been uploaded and make him alink too;).
echo "File (<a href=$upload_dir$filename>$filename</a>) uploaded!";
exit();
}
else
{
//Print error
echo "There was a problem moving your file";
exit();
}
}//end of is_uploaded_file
?>
<head>
<title>Upload File</title>
</head>
<form action="upload.php" method="post" enctype="multipart/form-data">
Browse a File to Upload:<br>
<input type="file" name="filetoupload"><br>
<input type="hidden" name="MAX_FILE_SIZE" value="<?echo $size_bytes; ?>">
<br>
<input type="Submit" value="Upload File">
</form>
<?php
/*
Author: Mohammed Ahmed(M@king)
E-mail: m at maaking dot com
WWW : http://www.maaking.com
*/
//**********************************************************************//
// $_FILES['filetoupload'] is the value of //
// file field from the form. <input type="file" name="filetoupload"> //
//**********************************************************************//
// this is the upload dir where files will go.
//Don't remove the /
//Chmod it (777)
$upload_dir = "images/"; //change to whatever you want.
// files less than 1MB
$size_bytes = 1048576; //bytes will be uploaded
$limit_file_type = "no"; //Do you want to limit the types of files uploaded. (yes/no)
// specify file types.
$allowed_file_type = array('image/gif',
'image/pjpeg',
'image/jpeg',
'image/png',
'image/jpg');
//check if the directory exist or not.
if (!is_dir("$upload_dir")) {
die ("The directory <b>($upload_dir)</b> doesn't exist");
}
//check if the directory is writable.
if (!is_writeable("$upload_dir")){
die ("The directory <b>($upload_dir)</b> is NOT writable, Please Chmod (777)");
}
//Check first if a file has been selected
//is_uploaded_file('filename') returns true if
//a file was uploaded via HTTP POST. Returns false otherwise.
if (is_uploaded_file($_FILES['filetoupload']['tmp_name']))
{//begin of is_uploaded_file
//Get the Size of the File
$size = $_FILES['filetoupload']['size'];
//Make sure that $size is less than 1MB (1000000 bytes)
if ($size > $size_bytes)
{
echo "File Too Large. File must be <b>$size_bytes</b> bytes.";
exit();
}
//check file type
if (($limit_file_type == "yes") && (!in_array($_FILES['filetoupload']['type'],$allowed_file_type)))
{
echo"wrong file type";
exit();
}
// $filename will hold the value of the file name submetted from the form.
$filename = $_FILES['filetoupload']['name'];
// Check if file is Already EXISTS.
if(file_exists($upload_dir.$filename)){
echo "Oops! The file named <b>$filename </b>already exists";
exit();
}
//Move the File to the Directory of your choice
//move_uploaded_file('filename','destination') Moves afile to a new location.
if (move_uploaded_file($_FILES['filetoupload']['tmp_name'],$upload_dir.$filename)) {
//tell the user that the file has been uploaded and make him alink too;).
echo "File (<a href=$upload_dir$filename>$filename</a>) uploaded!";
exit();
}
else
{
//Print error
echo "There was a problem moving your file";
exit();
}
}//end of is_uploaded_file
?>
what we used?
-The Super Global Variable $_FILES is used in PHP 4.x.x.
$_FILES['upload']['size'] ==> Get the Size of the File in Bytes.
$_FILES['upload']['tmp_name'] ==> Returns the Temporary Name of the File.
$_FILES['upload']['name'] ==> Returns the Actual Name of the File.
$_FILES['upload']['type'] ==> Returns the Type of the File.
****************
-Functions used
1- (!is_dir("$upload_dir"))
checks if the directory exist or not.
2- (!is_writeable("$upload_dir"))
checks if the directory is writable.
3- (is_uploaded_file($_FILES['filetoupload']['tmp_name'])
Checks first if a file has been selected
4- (!in_array($_FILES['filetoupload']['type'],$allowed_file_type))
checks file type eg. "gif,jpg etc."
5- (file_exists($upload_dir.$filename))
Checks if file is Already EXISTS.
6- (move_uploaded_file($_FILES['filetoupload']['tmp_name'],$upload_dir.$filename))
Moves the File to the Directory of your choice eg. "images"
- IS it a very simple and powerful WAY???.
- Enjoy
M@king
A word to people using this, make sure you chmod your directory to 77 so that php can write to it... I made that mistake and couldn't for the life of me figure out why it wasn't working... 
