public function generateNonce()
    {
        $data = function_exists('random_bytes') ? random_bytes(16) : openssl_random_pseudo_bytes(16);
        $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10

        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
    }
public function generateNonce()
    {
        $data = function_exists('random_bytes') ? random_bytes(16) : openssl_random_pseudo_bytes(16);
        $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10

        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
    }
public function generateNonce ( ) { $ data = function_exists ( 'random_bytes' ) ? random_bytes ( 16 ) : openssl_random_pseudo_bytes ( 16 ) ; $ data [ 6 ] = chr ( ord ( $ data [ 6 ] ) & 0x0f | 0x40 ) ; // set version to 0100 $ data [ 8 ] = chr ( ord ( $ data [ 8 ] ) & 0x3f | 0x80 ) ; // set bits 6-7 to 10 return vsprintf ( '%s%s-%s-%s-%s-%s%s%s' , str_split ( bin2hex ( $ data ) , 4 ) ) ; }
Generate a new nonce.

The nonce is a v4 UUID.

@see https://stackoverflow.com/a/15875555

@return string
The generated nonce.
Generate a new nonce .