With shmop_read, you probably get a "\0" - padded string.
$zero_padded = shmop_read($shm_seg, 0, 128);
$usable_string = rtrim($zero_padded, "\0");
With shmop_read, you probably get a "\0" - padded string.
$zero_padded = shmop_read($shm_seg, 0, 128);
$usable_string = rtrim($zero_padded, "\0");