[Theming Snippets] Change the placeholder image

wc-change-placeholder-image.php

/**
 * Change the placeholder image
 */
add_filter('woocommerce_placeholder_img_src', 'custom_woocommerce_placeholder_img_src');

function custom_woocommerce_placeholder_img_src( $src ) {
	$upload_dir = wp_upload_dir();
	$uploads = untrailingslashit( $upload_dir['baseurl'] );
	// replace with path to your image
	$src = $uploads . '/2012/07/thumb1.jpg';
	 
	return $src;
}

Why is this filter contained within an action on init? Why not just:

add_filter('woocommerce_placeholder_img_src', 'custom_woocommerce_placeholder_img_src');

function custom_woocommerce_placeholder_img_src( $src ) {
	$upload_dir = wp_upload_dir();
	$uploads = untrailingslashit( $upload_dir['baseurl'] );
	$src = $uploads . '/2012/07/thumb1.jpg';
	 
	return $src;
}

Thanks, @ethanclevenger91!