PHP去掉html中的空行、空白函数

function DeleteHtml($str){  
                    $str = trim($str);  
                    $str = ereg_replace("\t","",$str);  
                    $str = ereg_replace("\r\n","",$str);  
                    $str = ereg_replace("\r","",$str);  
                    $str = ereg_replace("\n","",$str);  
                    return trim($str);  
                }