다음 php 용법이 php 7에서는 사라진 용법인가요?

{@
    $search = array ("'<script[^>]*?>.*?</script>'si",  // 자바 스크립트 제거
                     "'<[\/\!]*?[^<>]*?>'si",           // HTML 태그 제거
                     "'([\r\n])[\s]+'",                 // 공백 제거
                     "'&(quot|#34);'i",                 // HTML 엔티티 치환
                     "'&(amp|#38);'i",
                     "'&(lt|#60);'i",
                     "'&(gt|#62);'i",
                     "'&(nbsp|#160);'i",
                     "'&(iexcl|#161);'i",
                     "'&(cent|#162);'i",
                     "'&(pound|#163);'i",
                     "'&(copy|#169);'i",
                     "'&#(\d+);'e");                    // php로 실행 
    $replace = array ("",
                      "",
                      "\\1",
                      "\"",
                      "&",
                      "<",
                      ">",
                      " ",
                      chr(161),
                      chr(162),
                      chr(163),
                      chr(169),
                      "chr(\\1)"); 
    $text_len = preg_replace($search, $replace, $oDocument->variables['content']);
}  
{mb_strlen(preg_replace("/(&([a-zA-Z]+)\;)|([\s\n\r]+)/","",$text_len), "UTF-8");}