public static function q($string)
    {
        # HACK: "self::SPECIAL_ESCAPE_OUT[...]" is not valid syntax in PHP 5.3, so put
        # it in a local variable first.
        $special_escape_out = self::SPECIAL_ESCAPE_OUT;

        $r = "\"";
        $len = \strlen($string);
        for ($i = 0; $i < $len; $i++) {
            $c = $string[$i];
            $escape_i = \strpos(self::SPECIAL_ESCAPE_IN, $c);
            if ($escape_i !== false) {
                // Characters with a special escape code.
                $r .= "\\";
                $r .= $special_escape_out[$escape_i];
            }
            else if ($c >= "\x20" and $c <= "\x7e") {
                // Printable characters.
                $r .= $c;
            }
            else {
                // Generic hex escape code.
                $r .= "\\x";
                $r .= \bin2hex($c);
            }
        }
        $r .= "\"";
        return $r;
    }
public static function q($string)
    {
        # HACK: "self::SPECIAL_ESCAPE_OUT[...]" is not valid syntax in PHP 5.3, so put
        # it in a local variable first.
        $special_escape_out = self::SPECIAL_ESCAPE_OUT;

        $r = "\"";
        $len = \strlen($string);
        for ($i = 0; $i < $len; $i++) {
            $c = $string[$i];
            $escape_i = \strpos(self::SPECIAL_ESCAPE_IN, $c);
            if ($escape_i !== false) {
                // Characters with a special escape code.
                $r .= "\\";
                $r .= $special_escape_out[$escape_i];
            }
            else if ($c >= "\x20" and $c <= "\x7e") {
                // Printable characters.
                $r .= $c;
            }
            else {
                // Generic hex escape code.
                $r .= "\\x";
                $r .= \bin2hex($c);
            }
        }
        $r .= "\"";
        return $r;
    }
public static function q ( $ string ) { # HACK: "self::SPECIAL_ESCAPE_OUT[...]" is not valid syntax in PHP 5.3, so put # it in a local variable first. $ special_escape_out = self :: SPECIAL_ESCAPE_OUT ; $ r = "\"" ; $ len = \ strlen ( $ string ) ; for ( $ i = 0 ; $ i < $ len ; $ i ++ ) { $ c = $ string [ $ i ] ; $ escape_i = \ strpos ( self :: SPECIAL_ESCAPE_IN , $ c ) ; if ( $ escape_i !== false ) { // Characters with a special escape code. $ r .= "\\" ; $ r .= $ special_escape_out [ $ escape_i ] ; } else if ( $ c >= "\x20" and $ c <= "\x7e" ) { // Printable characters. $ r .= $ c ; } else { // Generic hex escape code. $ r .= "\\x" ; $ r .= \ bin2hex ( $ c ) ; } } $ r .= "\"" ; return $ r ; }
Return a double-quoted version of the given string, using PHP-escape sequences
for all non-printable and non-ASCII characters.

@param string $string

@return string
Return a double - quoted version of the given string using PHP - escape sequences for all non - printable and non - ASCII characters .