Joseph G.

<?php
function send_email(){
$to = “[email protected]”;
$subject = “Hi!”;
$body = “Hi,\n\nHow are you?”;
if (mail($to, $subject, $body)) {
echo(“<p>Message successfully sent!</p>”);
} else {
echo(“<p>Message delivery failed…</p>”);
}
}

add_action(‘publish_post’,’send_email()’);
?>

HAPPY KODING!!! keke~

//example

function hello_world(){
echo ‘Hi World!’;
}
add_action(‘the_post’,’hello_world’);

//where the ‘the_post’ is the hook and the ‘hello_world’ is the function to be executed.

If you want to be specific then try this code. Put this in your theme’s functions.php

add_theme_support( ‘post-thumbnails’ ); // Let wordpress knows that your theme supports post-thumbnails

set_post_thumbnail_size( 50, 50, true ); //Set default image size for every thumbnails you select and its 50px by 50px;

add_image_size( ‘single-post-thumbnail’, 400, 9999 ); //your Thumbnail size

=========== and in the loop add this code
the_post_thumbnail() //for default thumbnail size
the_post_thumbnail(‘single-post-thumbnail’) //for custom sizes you defined at the functions.php

Yes, you can make wordpress custom page template… then write a functions that will execute your plugin…