How to Check if File is ASCII or Binary in PHP

Question

Is there a quick, simple way to check if a file is ASCII or binary with PHP?

Answer 1

this way it seems ok in my project:

function probably_binary($stringa) {
    $is_binary=false;
    $stringa=str_ireplace("\t","",$stringa);
    $stringa=str_ireplace("\n","",$stringa);
    $stringa=str_ireplace("\r","",$stringa);
    if(is_string($stringa) && ctype_print($stringa) === false){
        $is_binary=true;
    }
    return $is_binary;
}

PS: sorry, my first post, I wanted to add a comment to previous one :)