//Insert ads after second and fifth paragraph of single post content and after the post content. Provided by Bloggingdude.com:
add_filter( 'the_content', 'prefix_insert_post_ads' );

function prefix_insert_post_ads( $content ) { $ad_code = '<div> Adsense/Ad code goes here</div>'; if ( is_single() && ! is_admin() ) { return prefix_insert_after_paragraph( $ad_code, 2, $content ); } return $content; } add_filter( 'the_content', 'prefix_insert_post_adsNew' ); function prefix_insert_post_adsNew( $content ) { $ad_codenew = '<div> Adsense/Ad code goes here</div>'; if ( is_single() && ! is_admin() ) { return prefix_insert_after_paragraph( $ad_codenew, 5, $content ); } return $content; }

// Parent Function that makes the magic happen
function prefix_insert_after_paragraph( $insertion, $paragraph_id, $content ) { $closing_p = '</p>'; $paragraphs = explode( $closing_p, $content ); foreach ($paragraphs as $index => $paragraph) { if ( trim( $paragraph ) ) { $paragraphs[$index] .= $closing_p; } if ( $paragraph_id == $index + 1 ) { $paragraphs[$index] .= $insertion; } } return implode( '', $paragraphs ); }

// Add signature or ad after post content. Provided by Bloggingdude.com:
function custom_content_after_post($content){ if (is_single()) {	$content .= '<div> Adsense/Ad code goes here</div>'; } return $content; } add_filter( "the_content", "custom_content_after_post" );