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File Upload in PEAR and Smarty

Mukesh — Mon, 21 Jul 2008 10:07:18 +0000

For uploading files, you need to install a package of PEAR called ‘HTTP_Upload’ along with the installation of PEAR and Smarty.

HTTP_Upload is used for easy and secure managment of files submitted via HTML forms. This package provides an advanced system for managing uploads of files via HTML
fields. Features include:

1) Handling of multiple file uploads at a time

2) Safe file copying/moving from temporary directories

3) Upload validaton mechanisms

4) Extensive information about uploaded files

5) Renaming uploaded files

6) Internationalized error messages

Two class files are included in index.php. One is ConnectSmarty.class.php which is used for connecting with Smarty. I have explained about it in my previous article. The other is files.class.php.

files.class.php


class Files
{
function upload($field_name,$dest)
{
$upload =& new HTTP_Upload("en");
$file = $upload->getFiles($field_name);
if ($file->isValid())
{
$moved = $file->moveTo("$dest/");
if (PEAR::isError($moved))
{
require_once('ConnectSmarty.class.php');
// create an object of the class included above
$smarty = new ConnectSmarty;
$error =& $moved->getMessage();
// assign error message
$smarty->assign('errmessage',$error);

// display error message and exit
$smarty->display('error.tpl');
exit();
}
}
}
}
?>

This class file includes the upload class which becomes available after installing the HTTP_Upload package. I have created a function named ‘upload’ inside the class ‘Files’. The upload() function requires two parameters: $field_name and $dest.

$field_name is the name of input file.

$dest is the name of the destination directory where the file is to be uploaded.

The function getFiles() checks if a valid file was uploaded through the form. If the file is valid then it is moved to the destination directory.

If there is error while moving the file to the destination directory then the error message is fetched through the getMessage() function and displayed in a separate template file called error.tpl.

index.php


// create an object of the class included above
$smarty = new ConnectSmarty;
if(isset($_POST['submit']))
{
$post = $_POST;
$keys = "";
$type = $_FILES['logo']['type'];
// Only allowing jpeg and gif image to be uploaded
if($type == "image/jpeg" || $type == "image/gif")
{
/**
* file upload part
* creating an object of the class Files
* calling the upload function of the class Files
* the destination directory is to be created at first
* in this case, the destination directory is created and named 'uploads'
*/
$file =& new Files;
$fieldName = "logo";
$dest = "uploads";
$file->upload($fieldName,$dest);

// assign success message
$smarty->assign('success','File Uploaded Successfully');
}
else
{
// assign error message
$smarty->assign('error','Only jpge and gif image are supported.');

// display error message and exit
$smarty->display('index.tpl');
exit();
}
}

// display the content
$smarty->display('index.tpl');

?>

I have only allowed jpeg and gif image to be uploaded. If the file is successfully uploaded then a success message is assigned and displayed.

// assign success message

$smarty->assign('success','File Uploaded Successfully');

If the file is not of jpeg or gif type then an error message is assigned and displayed.

// assign error message

$smarty->assign('error','Only jpge and gif image are supported.');

// display error message and exit

$smarty->display('index.tpl');

exit();

index.tpl




 Homepage : File Upload




{$success}
{$error}

Upload Logo


Logo

error.tpl



{$errmessage}

Download source code

Note: I have not included Smarty library files in this zip file. You can download the Smarty library files from http://smarty.php.net/download.php or directly from http://chapagain.googlecode.com/files/smarty.zip

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What are Meta-Tags? Full Description of Meta tags

mukeshChapagain — Tue, 17 Jul 2007 06:41:50 +0000

Meta tags are HTML tags which provide information that describes the content of the webpage a user will be viewing.

Meta tags have two possible attributes:

(Note: I have used my name and my links in many of the examples below. Don’t forget to put your own name and description there.)

a) HTTP-EQUIV Tags

Meta tags with an HTTP-EQUIV attribute are equivalent to HTTP headers. Typically, they control the action of browsers, and may be used to refine the information provided by the actual headers. They are:-

Expires

The date and time after which the document should be considered expired.

Content-Type

This gives the character set.

Content-Script-Type

Specifies the default scripting language in a document.

Content-Style-Type

Specifies the default stylesheet language for the document.

Content-language

Used to declare the natural language of the document. May be used by robots to categorize by language. Languages are specified as the pair (language-dialect); here below, English-British (en-GB)

Refresh

Specifies a delay in seconds before the browser automatically reloads the document. Optionally, specifies an alternative URL to load.

Pragma

This tag tells IE not to cache the page.

b) NAME attributes

Meta tags with a name attribute are used for other types which do not correspond to HTTP Headers. They are:-

Robots

Controls web robots on a per-page basis, whether to index a page or not (index/noindex), and whether to follow links on the page or not (follow/nofollow). You can use these in any combination you want.

- index, follow – Default value. Page will be indexed, and links on the page will be followed.

- index, nofollow – Page will be indexed, but any links on the page will not be followed.

- noindex, follow – Page will not be indexed, but links on the page will be followed.

- noindex,nofollow – Page will not be indexed, and links on the page will not be followed.

Description

A short, plain language description of the document. Keep it short and to the point.

Keywords

Keywords are used by search engine to index our document in addition to words from the title and document body. It lets you specify keywords people might use when looking for your site. Enter as many as you can think of, but don’t repeat each word more than once.

Author

The author’s name.

A copyright statement.

Rating

A way to say that your site is family safe.

Revisit-after

This tells the search engine to come back again and re-index your site every 10 days (in case of this example)

Distribution

Classification

What kind of directory heading does this come under.

Reply-to

Enjoy!!!

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