PHP function to filter HTML code spaces, carriage returns and line feeds

PHP function to filter html code spaces and carriage returns and line feeds ​ ​ ​ ​ ​ ​ ​ ​
                 
                                                                                                                                                                                                                                                                                                       

*/
function deletehtml($str)
{
$str = trim($str);
$str=strip_tags($str,"");
$str=preg_replace( "{t}","",$str);
$str=preg_replace("{rn}","",$str);
$str=preg_replace("{r}","",$str) ;
$str=preg_replace("{n}","",$str);
$str=preg_replace("{ }","",$str);
return $str;
}


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