能够设置php cli进程标题但无法在我的进程中找到它

Question

I am successfully setting the process name in PHP using the following code:

$title = "test";
if(!cli_set_process_title($title)) {
    echo 'Unable to set process title' . PHP_EOL;
}
else {
    echo 'Successfully set the process title to ' . cli_get_process_title() . PHP_EOL;
}
while(true);

The problem is that when I type ps or top in the terminal, what I see is php rather than test. Any ideas why I don't see the process testamong the running processes?