Added a check to prevent non-CLI calls from failing.

src/RedisSimpleLock.php

@@ -24,16 +24,23 @@ class RedisSimpleLock implements Lock
      * @param Client               $client     the Predis client
      * @param integer              $ttl        lock time-to-live in milliseconds
      * @param LoggerInterface|null $logger
+     * @param array                $ignoredSAPIs the server apis to ignore the pcntl_signal callback for
      */
-    public function __construct($identifier, Client $client, $ttl = 10000, LoggerInterface $logger = null)
+    public function __construct($identifier, Client $client, $ttl = 10000, LoggerInterface $logger = null, array $ignoredSAPIs = [])
     {
         $this->identifier = $identifier;
         $this->client     = $client;
         $this->ttl        = $ttl;
         $this->logger     = $logger ?: new NullLogger;
         $this->id         = mt_rand();
         register_shutdown_function($closure = $this->releaseClosure());
-        pcntl_signal(SIGINT, $closure);
+
+        if (!in_array(php_sapi_name(), $ignoredSAPIs)) {
+            if (!function_exists('pcntl_signal')) {
+                throw new \RuntimeException("pcntl_signal() from the pcntl extension is not availlable, configure `$ignoredSAPIs = ['".php_sapi_name()."']` to skip catching SIGINT signal.");
+            }
+            pcntl_signal(SIGINT, $closure);
+        }
     }
 
     public function acquire()

src/RedisSimpleLockFactory.php

@@ -12,12 +12,14 @@ class RedisSimpleLockFactory implements TtlFactory
     private $client;
     private $defaultTtl;
     private $logger;
+    private $ignoredSAPIs;
 
-    public function __construct(Client $client, $defaultTtl = 10000, LoggerInterface $logger = null)
+    public function __construct(Client $client, $defaultTtl = 10000, LoggerInterface $logger = null, array $ignoredSAPIs = [])
     {
-        $this->client     = $client;
-        $this->defaultTtl = $defaultTtl;
-        $this->logger     = $logger ?: new NullLogger;
+        $this->client       = $client;
+        $this->defaultTtl   = $defaultTtl;
+        $this->logger       = $logger ?: new NullLogger;
+        $this->ignoredSAPIs = $ignoredSAPIs;
     }
 
     /**
@@ -30,6 +32,6 @@ public function __construct(Client $client, $defaultTtl = 10000, LoggerInterface
      */
     public function create($identifier, $ttl = null)
     {
-        return new RedisSimpleLock($identifier, $this->client, $ttl ?: $this->defaultTtl, $this->logger);
+        return new RedisSimpleLock($identifier, $this->client, $ttl ?: $this->defaultTtl, $this->logger, $this->ignoredSAPIs);
     }
 }

tests/RedisSimpleLockFactoryTest.php

@@ -13,10 +13,27 @@ protected function setUp()
         $this->redisClient->flushdb();
     }
 
+    public function testCreateIgnoredSAPIsLock()
+    {
+        $factory = new RedisSimpleLockFactory($this->redisClient, 50, null, [php_sapi_name()]);
+        $lock = $factory->create('lock identifier');
+        $this->assertInstanceOf(RedisSimpleLock::class, $lock);
+
+        if (function_exists('pcntl_signal_get_handler')) {
+            $handler = pcntl_signal_get_handler(SIGINT);
+            $this->assertEmpty($handler);
+        }
+    }
+
     public function testCreateLock()
     {
         $factory = new RedisSimpleLockFactory($this->redisClient, 50);
         $lock = $factory->create('lock identifier');
         $this->assertInstanceOf(RedisSimpleLock::class, $lock);
+
+        if (function_exists('pcntl_signal_get_handler')) {
+            $handler = pcntl_signal_get_handler(SIGINT);
+            $this->assertInstanceOf(Closure::class, $handler);
+        }
     }
 }

tests/RedisSimpleLockTest.php

@@ -11,7 +11,7 @@ protected function setUp()
         $this->redisClient = new \Predis\Client(getenv("REDIS_URI"));
         $this->redisClient->flushdb();
     }
-
+    
     public function testLock()
     {
         $lock1 = new RedisSimpleLock("lock identifier", $this->redisClient, 50);