public function getRandomString($length, $charset = null)
    {
        $length = (int) $length;
        if (!$charset) {
            $charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./';
        }

        $charsetLength = strlen($charset);
        $neededBytes = $this->getBytesInBits($length * ($this->getBitsInInteger($charsetLength) + 1));

        $string = '';
        do {
            $byteString = $this->generator->generate($neededBytes);
            for ($i = 0; $i < $neededBytes; ++$i) {
                if (ord($byteString[$i]) > (255 - (255 % $charsetLength))) {
                    continue;
                }
                $string .= $charset[ord($byteString[$i]) % $charsetLength];
            }
        } while (strlen($string) < $length);

        return substr($string, 0, $length);
    }
public function getRandomString($length, $charset = null)
    {
        $length = (int) $length;
        if (!$charset) {
            $charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./';
        }

        $charsetLength = strlen($charset);
        $neededBytes = $this->getBytesInBits($length * ($this->getBitsInInteger($charsetLength) + 1));

        $string = '';
        do {
            $byteString = $this->generator->generate($neededBytes);
            for ($i = 0; $i < $neededBytes; ++$i) {
                if (ord($byteString[$i]) > (255 - (255 % $charsetLength))) {
                    continue;
                }
                $string .= $charset[ord($byteString[$i]) % $charsetLength];
            }
        } while (strlen($string) < $length);

        return substr($string, 0, $length);
    }
public function getRandomString ( $ length , $ charset = null ) { $ length = ( int ) $ length ; if ( ! $ charset ) { $ charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./' ; } $ charsetLength = strlen ( $ charset ) ; $ neededBytes = $ this -> getBytesInBits ( $ length * ( $ this -> getBitsInInteger ( $ charsetLength ) + 1 ) ) ; $ string = '' ; do { $ byteString = $ this -> generator -> generate ( $ neededBytes ) ; for ( $ i = 0 ; $ i < $ neededBytes ; ++ $ i ) { if ( ord ( $ byteString [ $ i ] ) > ( 255 - ( 255 % $ charsetLength ) ) ) { continue ; } $ string .= $ charset [ ord ( $ byteString [ $ i ] ) % $ charsetLength ] ; } } while ( strlen ( $ string ) < $ length ) ; return substr ( $ string , 0 , $ length ) ; }
Get a random string of the specified length.

@param  integer $length The length of the requested string.
@return string  A random string of the specified length, consisting of
characters from the base64 character set.
Get a random string of the specified length .