PHP removes blank lines and blank functions in html_PHP tutorial

[php] 
function DeleteHtml($str){ 
                    $str = trim($str); 
                    $str = ereg_replace("t","",$str); 
                    $str = ereg_replace("rn","",$str); 
                    $str = ereg_replace("r","",$str); 
                    $str = ereg_replace("n","",$str); 
                    return trim($str); 
                } 

http://www.bkjia.com/PHPjc/477966.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/477966.htmlTechArticle[php] function DeleteHtml($str){ $str = trim($str); $str = ereg_replace(t,,$str); $str = ereg_replace(rn,,$str); $str = ereg_replace(r,,$str); $str = ereg_replace(n,,$str); ret...