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<?php | |
function attachment_link_convert($content){ | |
global $wpdb; | |
$upload_dir = wp_upload_dir(); | |
$pattern = '#(<a [^>]*href=[\'"])('.preg_quote($upload_dir['baseurl']).'/)([^\'"]*)([\'"][^>]*><img [^>]*></a>)#uism'; | |
if ( preg_match_all($pattern, $content, $matches, PREG_SET_ORDER) ) { | |
foreach ( $matches as $match ) { | |
$attachment_id = $wpdb->get_var($wpdb->prepare(" | |
select p.ID | |
from {$wpdb->posts} as p | |
inner join {$wpdb->postmeta} as m on p.ID = m.post_id | |
where m.meta_key = %s | |
and m.meta_value = %s | |
limit 1", | |
'_wp_attached_file', | |
$match[3])); | |
if ( $attachment_id ) { | |
$attachment_url = get_attachment_link($attachment_id); | |
$new_link = $match[1].$attachment_url.$match[4]; | |
$content = str_replace($match[0], $new_link, $content); | |
} | |
} | |
} | |
unset ($matches); | |
return $content; | |
} | |
add_filter('the_content','attachment_link_convert'); |
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