Sitewide Custom Functions

[Carlos]

Create a plugin like:

PHP Code:

<?php
$thisfile = basename(__FILE__, ".php");
register_plugin(
    $thisfile,
    'Sitewide custom functions',
    '0.1',
    'Author name',
    '#',
    'Sitewide custom functions. Do not deactivate!'
);

function sitewide_function1() {
//...
}
// end 


and insert your custom functions there. Save as sitewide.php (or whatever you prefer) and activate the plugin. They will be available to all themes.