// int64
// pack() does not support 64-bit ints either so pack into two 32-bits
$p1 = pack( 'l', $value & 0xFFFFFFFF );
+ // @phan-suppress-next-line PhanTypeInvalidLeftOperandOfIntegerOp
$p2 = pack( 'l', ( $value >> 32 ) & 0xFFFFFFFF );
return self::$bigendian
? pack( 'Ca4a4', 0xD3, $p1, $p2 )