diff --git a/sample_push.php b/sample_push.php
index 96475f7e..c3f96aeb 100644
--- a/sample_push.php
+++ b/sample_push.php
@@ -1,7 +1,10 @@
 <?php
+
 /**
  * Push demo
  *
+ * phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols, PSR1.Classes.ClassDeclaration.MissingNamespace
+ *
  * SPDX-FileCopyrightText: Copyright 2010 Aldo Armiento (aldo.armiento@gmail.com)
  * SPDX-FileCopyrightText: Copyright 2021 M2mobi B.V., Amsterdam, The Netherlands
  * SPDX-FileCopyrightText: Copyright 2022 Move Agency Group B.V., Zwolle, The Netherlands
@@ -19,17 +22,17 @@
 
 class SampleLogger extends \Psr\Log\AbstractLogger
 {
-	public function log($level, $message, array $context = array()): void
-	{
-		printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
-	}
+    public function log($level, $message, array $context = []): void
+    {
+        printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
+    }
 }
 
 // Instantiate a new ApnsPHP_Push object
 $push = new \ApnsPHP\Push(
-	\ApnsPHP\Push::ENVIRONMENT_SANDBOX,
-	'server_certificates_bundle_sandbox.pem',
-	new SampleLogger(),
+    \ApnsPHP\Push::ENVIRONMENT_SANDBOX,
+    'server_certificates_bundle_sandbox.pem',
+    new SampleLogger(),
 );
 
 // Set the Provider Certificate passphrase
@@ -55,10 +58,10 @@ public function log($level, $message, array $context = array()): void
 $message->setSound();
 
 // Set a custom property
-$message->setCustomProperty('acme2', array('bang', 'whiz'));
+$message->setCustomProperty('acme2', ['bang', 'whiz']);
 
 // Set another custom property
-$message->setCustomProperty('acme3', array('bing', 'bong'));
+$message->setCustomProperty('acme3', ['bing', 'bong']);
 
 // Set the expiry value to 30 seconds
 $message->setExpiry(30);
@@ -75,5 +78,5 @@ public function log($level, $message, array $context = array()): void
 // Examine the error message container
 $aErrorQueue = $push->getErrors();
 if (!empty($aErrorQueue)) {
-	var_dump($aErrorQueue);
+    var_dump($aErrorQueue);
 }
diff --git a/sample_push_custom.php b/sample_push_custom.php
index 422b9149..1e9b40e7 100644
--- a/sample_push_custom.php
+++ b/sample_push_custom.php
@@ -1,7 +1,10 @@
 <?php
+
 /**
  * CustomMessage Push demo
  *
+ * phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols, PSR1.Classes.ClassDeclaration.MissingNamespace
+ *
  * SPDX-FileCopyrightText: Copyright 2010 Aldo Armiento (aldo.armiento@gmail.com)
  * SPDX-FileCopyrightText: Copyright 2021 M2mobi B.V., Amsterdam, The Netherlands
  * SPDX-FileCopyrightText: Copyright 2022 Move Agency Group B.V., Zwolle, The Netherlands
@@ -19,17 +22,17 @@
 
 class SampleLogger extends \Psr\Log\AbstractLogger
 {
-	public function log($level, $message, array $context = array()): void
-	{
-		printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
-	}
+    public function log($level, $message, array $context = []): void
+    {
+        printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
+    }
 }
 
 // Instanciate a new ApnsPHP_Push object
 $push = new \ApnsPHP\Push(
-	\ApnsPHP\Push::ENVIRONMENT_SANDBOX,
-	'server_certificates_bundle_sandbox.pem',
-	new SampleLogger(),
+    \ApnsPHP\Push::ENVIRONMENT_SANDBOX,
+    'server_certificates_bundle_sandbox.pem',
+    new SampleLogger(),
 );
 
 // Connect to the Apple Push Notification Service
@@ -52,7 +55,7 @@ public function log($level, $message, array $context = array()): void
 $message->setSound();
 
 // Set a custom property
-$message->setCustomProperty('acme2', array('bang', 'whiz'));
+$message->setCustomProperty('acme2', ['bang', 'whiz']);
 
 // Set the expiry value to 30 seconds
 $message->setExpiry(30);
@@ -61,8 +64,9 @@ public function log($level, $message, array $context = array()): void
 $message->setActionLocKey('Show me!');
 
 // Set the alert-message string and variable string values to appear in place of the format specifiers.
-$message->setLocKey('Hello %1$@, you have %2$@ new messages!'); // This will overwrite the text specified with setText() method.
-$message->setLocArgs(array('Steve', 5));
+// This will overwrite the text specified with setText() method.
+$message->setLocKey('Hello %1$@, you have %2$@ new messages!');
+$message->setLocArgs(['Steve', 5]);
 
 // Set the filename of an image file in the application bundle.
 $message->setLaunchImage('DefaultAlert.png');
@@ -79,5 +83,5 @@ public function log($level, $message, array $context = array()): void
 // Examine the error message container
 $aErrorQueue = $push->getErrors();
 if (!empty($aErrorQueue)) {
-	var_dump($aErrorQueue);
+    var_dump($aErrorQueue);
 }
diff --git a/sample_push_http.php b/sample_push_http.php
index a14fed84..0f866f4d 100644
--- a/sample_push_http.php
+++ b/sample_push_http.php
@@ -1,7 +1,10 @@
 <?php
+
 /**
  * Push demo
  *
+ * phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols, PSR1.Classes.ClassDeclaration.MissingNamespace
+ *
  * SPDX-FileCopyrightText: Copyright 2010 Aldo Armiento (aldo.armiento@gmail.com)
  * SPDX-FileCopyrightText: Copyright 2021 M2mobi B.V., Amsterdam, The Netherlands
  * SPDX-FileCopyrightText: Copyright 2022 Move Agency Group B.V., Zwolle, The Netherlands
@@ -19,17 +22,17 @@
 
 class SampleLogger extends \Psr\Log\AbstractLogger
 {
-	public function log($level, $message, array $context = array()): void
-	{
-		printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
-	}
+    public function log($level, $message, array $context = []): void
+    {
+        printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
+    }
 }
 
 // Instantiate a new ApnsPHP_Push object
 $push = new \ApnsPHP\Push(
-	\ApnsPHP\Push::ENVIRONMENT_SANDBOX,
-	'UniversalPushNotificationClientSSLCertificate.p8',
-	new SampleLogger(),
+    \ApnsPHP\Push::ENVIRONMENT_SANDBOX,
+    'UniversalPushNotificationClientSSLCertificate.p8',
+    new SampleLogger(),
 );
 
 $push->setTeamId('sgfdgfdfgd');
@@ -64,10 +67,10 @@ public function log($level, $message, array $context = array()): void
 $message->setSound();
 
 // Set a custom property
-$message->setCustomProperty('acme2', array('bang', 'whiz'));
+$message->setCustomProperty('acme2', ['bang', 'whiz']);
 
 // Set another custom property
-$message->setCustomProperty('acme3', array('bing', 'bong'));
+$message->setCustomProperty('acme3', ['bing', 'bong']);
 
 // Set the expiry value to 30 seconds
 $message->setExpiry(30);
@@ -84,5 +87,5 @@ public function log($level, $message, array $context = array()): void
 // Examine the error message container
 $aErrorQueue = $push->getErrors();
 if (!empty($aErrorQueue)) {
-	var_dump($aErrorQueue);
+    var_dump($aErrorQueue);
 }
diff --git a/sample_push_many.php b/sample_push_many.php
index 48876e0e..653f515b 100644
--- a/sample_push_many.php
+++ b/sample_push_many.php
@@ -1,7 +1,10 @@
 <?php
+
 /**
  * Push demo
  *
+ * phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols, PSR1.Classes.ClassDeclaration.MissingNamespace
+ *
  * SPDX-FileCopyrightText: Copyright 2010 Aldo Armiento (aldo.armiento@gmail.com)
  * SPDX-FileCopyrightText: Copyright 2021 M2mobi B.V., Amsterdam, The Netherlands
  * SPDX-FileCopyrightText: Copyright 2022 Move Agency Group B.V., Zwolle, The Netherlands
@@ -22,17 +25,17 @@
 
 class SampleLogger extends \Psr\Log\AbstractLogger
 {
-	public function log($level, $message, array $context = array()): void
-	{
-		printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
-	}
+    public function log($level, $message, array $context = []): void
+    {
+        printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
+    }
 }
 
 // Instanciate a new ApnsPHP_Push object
 $push = new \ApnsPHP\Push(
-	\ApnsPHP\Push::ENVIRONMENT_SANDBOX,
-	'server_certificates_bundle_sandbox.pem',
-	new SampleLogger(),
+    \ApnsPHP\Push::ENVIRONMENT_SANDBOX,
+    'server_certificates_bundle_sandbox.pem',
+    new SampleLogger(),
 );
 
 // Increase write interval to 100ms (default value is 10ms).
@@ -45,18 +48,18 @@ public function log($level, $message, array $context = array()): void
 $push->connect();
 
 for ($i = 1; $i <= 10; $i++) {
-	// Instantiate a new Message with a single recipient
-	$message = new \ApnsPHP\Message($i == 5 ? INVALID_TOKEN : VALID_TOKEN);
+    // Instantiate a new Message with a single recipient
+    $message = new \ApnsPHP\Message($i == 5 ? INVALID_TOKEN : VALID_TOKEN);
 
-	// Set a custom identifier. To get back this identifier use the getCustomIdentifier() method
-	// over a ApnsPHP_Message object retrieved with the getErrors() message.
-	$message->setCustomIdentifier(sprintf("Message-Badge-%03d", $i));
+    // Set a custom identifier. To get back this identifier use the getCustomIdentifier() method
+    // over a ApnsPHP_Message object retrieved with the getErrors() message.
+    $message->setCustomIdentifier(sprintf("Message-Badge-%03d", $i));
 
-	// Set badge icon to "3"
-	$message->setBadge($i);
+    // Set badge icon to "3"
+    $message->setBadge($i);
 
-	// Add the message to the message queue
-	$push->add($message);
+    // Add the message to the message queue
+    $push->add($message);
 }
 
 // Send all messages in the message queue
@@ -68,5 +71,5 @@ public function log($level, $message, array $context = array()): void
 // Examine the error message container
 $aErrorQueue = $push->getErrors();
 if (!empty($aErrorQueue)) {
-	var_dump($aErrorQueue);
+    var_dump($aErrorQueue);
 }
diff --git a/sample_push_safari.php b/sample_push_safari.php
index 0e41bcbc..fad42a75 100644
--- a/sample_push_safari.php
+++ b/sample_push_safari.php
@@ -1,7 +1,10 @@
 <?php
+
 /**
  * SafariMessage push demo.
  *
+ * phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols, PSR1.Classes.ClassDeclaration.MissingNamespace
+ *
  * SPDX-FileCopyrightText: Copyright 2017 Marco Rocca (marco.rocca@delitestudio.com)
  * SPDX-FileCopyrightText: Copyright 2021 M2mobi B.V., Amsterdam, The Netherlands
  * SPDX-FileCopyrightText: Copyright 2022 Move Agency Group B.V., Zwolle, The Netherlands
@@ -19,17 +22,17 @@
 
 class SampleLogger extends \Psr\Log\AbstractLogger
 {
-	public function log($level, $message, array $context = array()): void
-	{
-		printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
-	}
+    public function log($level, $message, array $context = []): void
+    {
+        printf("%s: %s ApnsPHP[%d]: %s\n", date('r'), strtoupper($level), getmypid(), trim($message));
+    }
 }
 
 // Instantiate a new ApnsPHP_Push object
 $push = new \ApnsPHP\Push(
-	\ApnsPHP\Push::ENVIRONMENT_SANDBOX,
-	'server_certificates_bundle_sandbox.pem',
-	new SampleLogger(),
+    \ApnsPHP\Push::ENVIRONMENT_SANDBOX,
+    'server_certificates_bundle_sandbox.pem',
+    new SampleLogger(),
 );
 
 // Set the Provider Certificate passphrase
@@ -51,8 +54,9 @@ public function log($level, $message, array $context = array()): void
 // This label should be succinct, such as "Details" or "Read more". If omitted, the default value is "Show".
 $message->setAction('View');
 
-// Set an array of values that are paired with the placeholders inside the urlFormatString value of your website.json file
-$message->setUrlArgs(array('boarding', 'A998'));
+// Set an array of values that are paired with the placeholders inside the urlFormatString value
+// of your website.json file
+$message->setUrlArgs(['boarding', 'A998']);
 
 // Add the message to the message queue
 $push->add($message);
@@ -66,5 +70,5 @@ public function log($level, $message, array $context = array()): void
 // Examine the error message container
 $aErrorQueue = $push->getErrors();
 if (!empty($aErrorQueue)) {
-	var_dump($aErrorQueue);
+    var_dump($aErrorQueue);
 }