is it possible to pass the value of a custom field to a function in functions.php?

wordpress-custom-field-functions.php

<p>is it possible to pass the value of a custom field to a function in functions.php?</p>

<p>Way #1</p>

<?php
// one way would be to pass in the post ID
function yourSpecialFunction($post_id) {
	$custom_field = get_post_meta($post_id, 'my_custom_field', true);
	// do something with $custom_field
	return;
}
?>
<!--Then when you call it, say in the loop:-->
<?php yourSpecialFunction(get_the_ID()); ?>

<p>Way #2</p>

<?php
// another way would be to get the value and pass it in
function yourSpecialOtherFunction($custom_field) {
	// do something with $custom_field
	return;
}
?>
<!--Then when you call it, say in the loop:-->
<?php
$custom_field = get_post_meta(get_the_ID(), 'my_custom_field', true);
yourSpecialOtherFunction($custom_field);
?>