PHP：字符串到完整ASCII

Question

I'm using an RTF converter and I need 240 as &#U050&#U052&#U048 but Im not to sure how to do this!?!

I have tried using the following function:

function string_to_ascii($string) {
    $ascii = NULL;
    for ($i = 0; $i < strlen($string); $i++) {
            $ascii += "&#U"+str_pad(ord($string[$i]),3,"0",STR_PAD_LEFT);
    }
    return($ascii);
}

But it still just outputs just the number (eg 2 = 50 ) and ord just makes it go mad.

I've tried echo "-&#U"+ord("2")+"-"; and I get 50416 !?!?

I have a feeling it might have something to do with encoding

Answer 1

I think you're over thinking this. Convert the string to an array with str_split , map ord to all of it, then if you want to format each one, use sprintf (or str_pad if you'd like), like this:

function string_to_ascii($string) {
    $array = array_map( 'ord', str_split( $string));
    // Optional formatting:
    foreach( $array as $k => &$v) {
        $v = sprintf( "%03d", $v);
    }
    return "&#U" . implode( "&#U", $array);
}

Now, when you pass string_to_ascii( '240') , you get back string(18) "&#U050&#U052&#U048" .

Answer 2

Just found this:

function to_ascii($string) {
    $ascii_string = '';
    foreach (str_split($string) as $char) {
        $ascii_string .= '&#' . ord($char) . ';';
    }
    return $ascii_string;
}

here