想請問sem_get裡的$autoRelease 和 sem_release() 釋放的是一樣的東西嗎?
因為小弟測試

1. $autoRelease = 1 , 將 sem_release($semaphore)拿掉，好像也不會自動釋放
2. $autoRelease = 0 , 將 sem_release($semaphore)拿掉，結果和1一樣
   問題:
3. $autoRelease = 1 或 $autoRelease = 0 實際的差異在哪裡?
4. sem_remove() 和 sem_release() 的差異在哪裡(使用時機)
   第一次接觸semaphore 想請各路高手解惑，謝謝

//Semaphore properties
$key = 123456;
$max = 1;
$permissions = 0666;
$autoRelease = 1;
 
//Open a new or get an existing semaphore
$semaphore = sem_get($key, $max, $permissions, $autoRelease);
if(!$semaphore) {
     echo "Failed on sem_get().\n";
     exit;
}
 
//Try to aquire the semaphore.
for($i = 0; $i < 2; $i++) {
     echo "\nAttempting to acquire semaphore...\n";
     sem_acquire($semaphore);
 
     echo "Aquired.\n";
     echo "Enter some text: ";
     $handler = fopen("php://stdin", "r");
     $text = fgets($handler);
 
     fclose($handler);
     sem_release($semaphore);
 
     echo "Got: $text \n";
}