learndash_post2pdf_conv_img_size learndash_post2pdf_conv_img_size( array $matches ) Adds the height and width to the image tag. ContentsDescription Parameters Return Source Description # Used as a callback in preg_replace_callback function. Parameters # $matches (array) (Required) array with strings to search and replace. Return # (string) The image align center markup. Source # File: includes/ld-convert-post-pdf.php