function inline_css($html) { $style_start = stripos($html, '<style'); $style_start = stripos($html, '>', $style_start) + 1; $style_end = stripos($html, '</style>', $style_start); $css = substr($html, $style_start, $style_end - $style_start); require_once HAET_MAIL_PATH . '/vendor/autoload.php'; $cssToInlineStyles = new TijsVerkoyen\CssToInlineStyles\CssToInlineStyles(); $cssToInlineStyles->setHTML($html); $cssToInlineStyles->setCSS($css); return $cssToInlineStyles->convert(); }