$html = preg_replace('/]*>[\s　]*<\/p>/u', '', $html); $html = trim($html); preg_match_all('/]*>.*?<\/p>/is', $html, $matches); if (count($matches[0]) === 1) { return preg_replace( ['/^\s*]*)>/i', '/<\/p>\s*$/i'], ['', ''], $html ); } return $html; } }