how to create a simle plugin in wodpress

this is th plugin for gallery first create a file --


/*

Plugin Name:Side Gallery

Plugin URI:

Description:

Author: Vikas Gautam


*/

include("side_function.php");

add_action('admin_menu', 'add_admin_panel');

function add_admin_panel(){

$icon_path = get_option('siteurl').'/wp-content/plugins/'.basename(dirname(__FILE__)).'/icon';

add_menu_page('Side Gallery', 'Side Gallery','read','my-plug','',$icon_path.'/icon.png');

add_submenu_page('my-plug', 'Side Gallery', '1st Submenu', 'read', 'my-plug','my_menu_default');

}

function my_menu_default(){?>



$sql=mysql_query("CREATE TABLE `td_sidebar_image` (

`id` int(100) NOT NULL AUTO_INCREMENT,

`image_name` varchar(100) COLLATE utf8_unicode_ci NOT NULL,

`path` varchar(100) COLLATE utf8_unicode_ci NOT NULL,

PRIMARY KEY (`id`)

)");



Manage Side Bar Slider





/* Inserting Image*/


$image=new side_gallery;

$image1=$image->inser_image();


/* Inserting image End */


$image_data1=$image->Show_data();

?>




$count=1;

$i=0;

$j=0;

foreach($image_data1 as $image12)

{ $id=$image12['id'];

?>


echo "

".$count."
";?>




echo "

";
?>

if(isset($_POST[$i]))
{
if($_REQUEST['b'.$j])
{
$id12=$_REQUEST['b'.$j];
//echo $_REQUEST['b'.$j];
$image_delete=$image->delete_image($id12);

}
}
$i++;
$j++;
$count++;
}


?>




}


?>








After to handele function add this fiie side_function.php








class side_gallery

{

function inser_image()

{

if(isset($_POST['submit']))

{

$image=$_FILES["file"]["name"];

$path1="../wp-content/Sidebar_image/" . $_FILES["file"]["name"];

$upload_image=mysql_query("insert into td_sidebar_image (id,image_name,path) values('',' $image','$path1')");

echo "$sql";

echo " Record Inserted";

move_uploaded_file($_FILES["file"]["tmp_name"],

"../wp-content/Sidebar_image/" . $_FILES["file"]["name"]);

$path1="../wp-content/Sidebar_image/" . $_FILES["file"]["name"];

}

}


function Show_data()

{


$data=mysql_query("select * from td_sidebar_image");

while($data1=mysql_fetch_assoc($data))

{

$image_data[]=$data1;

//echo $data1['image_name'];

}

return $image_data;

}



function delete_image($id12)

{


$unlik_image=mysql_query("select * from td_sidebar_image where id=$id12");

$data12=mysql_fetch_assoc($unlik_image);

$rt=$data12['path'];


unlink($rt);




$delete=mysql_query("delete from td_sidebar_image where id=$id12");




if($delete)

{

echo "Record Deleted Successfully";

}


}


}


function plugin_side_gallery()

{


$sql=mysql_query("select * from td_sidebar_image");

while($data=mysql_fetch_assoc($sql))

{

$image_da[]=$data;

}

return $image_da;

}



?>