luni, 23 mai 2011

php upload file on server

html part:

// filename: upload.form.php

// first let's set some variables

// make a note of the current working directory relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the location of the upload handler
$uploadHandler = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'areas/upload.processor.php';

echo $uploadHandler;

// set a max file size for the html upload form
$max_file_size = 30000; // size in bytes

// now echo the html page
?><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">

<link rel="stylesheet" type="text/css" href="stylesheet.css">

<title>Upload form</title>

</head>

<body>

<form id="Upload" action="<?php echo $uploadHandler ?>" enctype="multipart/form-data" method="post">

<h1>
Upload form
</h1>

<p>
<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size ?>">
</p>

<p>
<label for="file">File to upload:</label>
<input id="file" type="file" name="file">
</p>

<p>
<label for="submit">Press to...</label>
<input id="submit" type="submit" name="submit" value="Upload me!">
</p>

</form>


</body>

</html>

php part:


<?php

// filename: upload.processor.php

// first let's set some variables

// make a note of the current working directory, relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the directory that will recieve the uploaded files
$uploadsDirectory = $_SERVER['DOCUMENT_ROOT'] . '/uploads/';

// make a note of the location of the upload form in case we need it
$uploadForm; //'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'home.php';

// make a note of the location of the success page
$uploadSuccess ;

// name of the fieldname used for the file in the HTML form
$fieldname = 'file';



// Now let's deal with the upload

// possible PHP upload errors
$errors = array(1 => 'php.ini max file size exceeded',
                2 => 'html form max file size exceeded',
                3 => 'file upload was only partial',
                4 => 'no file was attached');

// check the upload form was actually submitted else print form
isset($_POST['submit'])
or error('the upload form is neaded', $uploadForm);

// check for standard uploading errors
($_FILES[$fieldname]['error'] == 0)
or error($errors[$_FILES[$fieldname]['error']], $uploadForm);

// check that the file we are working on really was an HTTP upload
@is_uploaded_file($_FILES[$fieldname]['tmp_name'])
or error('not an HTTP upload', $uploadForm);

// validation... since this is an image upload script we
// should run a check to make sure the upload is an image
@getimagesize($_FILES[$fieldname]['tmp_name'])
or error('only image uploads are allowed', $uploadForm);

// make a unique filename for the uploaded file and check it is
// not taken... if it is keep trying until we find a vacant one
//$now = time();
//while(file_exists($uploadFilename = $uploadsDirectory.$now.'-'.$_FILES[$fieldname]['name']))
//{
//$now++;
//}
$uploadFilename = $uploadsDirectory.$_FILES[$fieldname]['name'];

// now let's move the file to its final and allocate it with the new filename
@move_uploaded_file($_FILES[$fieldname]['tmp_name'], $uploadFilename)
or error('receiving directory insuffiecient permission', $uploadForm);

// If you got this far, everything has worked and the file has been successfully saved.
// We are now going to redirect the client to the success page.
header('Location: ' . $uploadSuccess);



// make an error handler which will be used if the upload fails
function error($error, $location, $seconds = 5)
{
header("Refresh: $seconds; URL=\"$location\"");
echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'."\n".
'"http://www.w3.org/TR/html4/strict.dtd">'."\n\n".
'<html lang="en">'."\n".
' <head>'."\n".
' <meta http-equiv="content-type" content="text/html; charset=iso-8859-1">'."\n\n".
' <link rel="stylesheet" type="text/css" href="stylesheet.css">'."\n\n".
' <title>Upload error</title>'."\n\n".
' </head>'."\n\n".
' <body>'."\n\n".
' <div id="Upload">'."\n\n".
' <h1>Upload failure</h1>'."\n\n".
' <p>An error has occured: '."\n\n".
' <span class="red">' . $error . '...</span>'."\n\n".
' The upload form is reloading</p>'."\n\n".
' </div>'."\n\n".
'</html>';
exit;
} // end error handler

?>

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