Moves the EDD Purchase button (and variations) to the top of the content instead of placing it at the bottom. Removes the original purchase links so they don't show up twice. Blogged: http://wp.me/p1Fud2-1of June 26, 2014

edd-purchase-links-top-of-content.php

<?php
/**
 * Puts the purchase links before the content
 *
 * @since 1.0.0
 * @global $post
 * @author SFNdesign, Curtis McHale
 *
 * @param $content The the_content field of the download object
 * @return string the content with any additional data attached
 */
function sfn_edd_purchase_at_top( $content ) {
	global $post;

	if ( $post && $post->post_type == 'download' && is_singular( 'download' ) && is_main_query() && !post_password_required() ) {
		ob_start();
		$download_id = absint( $post->ID );
		if ( ! get_post_meta( $download_id, '_edd_hide_purchase_link', true ) ) {
			echo edd_get_purchase_link( array( 'download_id' => $download_id ) );
		}
		$new_content .= ob_get_clean();
		$content = $new_content . $content;
	}

	return $content;
}
add_filter( 'the_content', 'sfn_edd_purchase_at_top' );
remove_action( 'edd_after_download_content', 'edd_append_purchase_link' );