diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 07bbdee..0230b29 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -6,27 +6,27 @@ permissions:
   contents: read
 
 jobs:
-  run:    
+  run:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['8.1', '8.2', '8.3']
+        php-versions: [ '8.1', '8.2', '8.3' ]
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
     steps:
-    - uses: actions/checkout@v4
-    - name: Setup PHP
-      uses: shivammathur/setup-php@v2
-      with:
-        php-version: ${{ matrix.php-versions }}
-        tools: phpunit-bridge
-        extensions: mbstring, xml, ctype, iconv, intl
-        coverage: xdebug
-
-    -   name: Get composer cache directory
+      - uses: actions/checkout@v4
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          tools: phpunit-bridge
+          extensions: mbstring, xml, ctype, iconv, intl
+          coverage: xdebug
+
+      - name: Get composer cache directory
         id: composer-cache
         run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
-        
-    -   name: Cache composer dependencies
+
+      - name: Cache composer dependencies
         uses: actions/cache@v3
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
@@ -35,11 +35,11 @@ jobs:
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
           restore-keys: ${{ runner.os }}-composer-
 
-    -   name: Install Composer dependencies
+      - name: Install Composer dependencies
         run: composer install --no-progress --prefer-dist --optimize-autoloader
 
-    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
-    # Docs: https://getcomposer.org/doc/articles/scripts.md
+      # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
+      # Docs: https://getcomposer.org/doc/articles/scripts.md
 
-    - name: Run test suite
-      run: composer run-script test
+      - name: Run test suite
+        run: composer run-script test
diff --git a/README.md b/README.md
index 31d5977..f0a5dba 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ PHP defer function schedules a function call (the deferred function) to be run i
 executing the defer returns. It's an unusual but effective way to deal with situations such as resources that must be
 released regardless of which path a function takes to return. The canonical examples are unlocking a mutex or closing a
 file.
+
 ```php
 // Contents returns the file's contents as a string.
 function contents($filename) {
@@ -15,7 +16,7 @@ function contents($filename) {
     if ($f === false) {
         throw new Exception("Error opening the file");
     }
-    defer(fclose(...),$f);  // fclose will run when we're finished.
+    $defer = defer(fclose(...),$f);  // fclose will run when we're finished.
 
     $result = ""; 
 
@@ -33,7 +34,9 @@ function contents($filename) {
 }
 ```
 
-Deferring a call to a function such as Close has two advantages. First, it guarantees that you will never forget to close the file, a mistake that's easy to make if you later edit the function to add a new return path. Second, it means that the close sits near the open, which is much clearer than placing it at the end of the function.
+Deferring a call to a function such as Close has two advantages. First, it guarantees that you will never forget to
+close the file, a mistake that's easy to make if you later edit the function to add a new return path. Second, it means
+that the close sits near the open, which is much clearer than placing it at the end of the function.
 
 ---
 
@@ -47,14 +50,14 @@ composer require tito10074/defer
 
 ```php
 function foo($a){
-	echo "in defer {$a}".PHP_EOL;
+    echo "in defer {$a}".PHP_EOL;
 }
 function a() {
-	echo "before defer".PHP_EOL;
-	$defer = defer(foo(...),1);
-	$defer(foo(...),2);
-	$defer(foo(...),3);
-	echo "after defer".PHP_EOL;
+    echo "before defer".PHP_EOL;
+    $defer = defer(foo(...),1);
+    $defer(foo(...),2);
+    $defer(foo(...),3);
+    echo "after defer".PHP_EOL;
 };
 
 echo "start".PHP_EOL;
@@ -86,9 +89,9 @@ The deferred call will print `0` after the function returns.
 
 ```php
 function a(){
-	$i=0;
-	defer(printf(...),$i);
-	$i++;
+    $i=0;
+    $_ = defer(printf(...),$i);
+    $i++;
 }
 ```
 
@@ -102,9 +105,9 @@ This function prints `3210`:
 ```php
 function b(){
     $defer = defer();
-	for($i=0;$i<4;$i++){
-		$defer(printf(...),$i);
-	}
+    for($i=0;$i<4;$i++){
+        $defer(printf(...),$i);
+    }
 }
 ```
 
@@ -116,16 +119,16 @@ function returns but not modify returned `$i`. This example print `2-3`:
 
 ```php
 function c() {
-	$i=1;
-	$o=new \stdClass();
-	$o->i=2;
-	defer(function () use (&$i, $o) {
-		$o->i++;
-		$i++;
-	});
-
-	$i++;
-	return [$i,$o];
+    $i=1;
+    $o=new \stdClass();
+    $o->i=2;
+    $defer = defer(function () use (&$i, $o) {
+        $o->i++;
+        $i++;
+    });
+
+    $i++;
+    return [$i,$o];
 }
 list($i,$o) = c();
 echo "{$i}-{$o->i}".PHP_EOL;
@@ -149,23 +152,23 @@ require_once __DIR__.'/../vendor/autoload.php';
 
 function myFunc(){}
 class Foo{
-	public function myMethod(){}
+    public function myMethod(){}
 }
 function a(){
-	// defer custom function without parameter
-	// function name must be with his namespace
-	$defer = defer('test\myFunc');
-	// defer function with one parameter
-	$defer(printf(...),"test");
-	// defer function with more parameters
-	$defer('printf',"%s-%s",10,12);
-	// defer with anonymous function
-	$defer(function (){});
-	$func = function (){};
-	$defer($func);
-	//defer method
-	$foo = new Foo();
-	$defer([$foo,'myMethod']);
+    // defer custom function without parameter
+    // function name must be with his namespace
+    $defer = defer('test\myFunc');
+    // defer function with one parameter
+    $defer(printf(...),"test");
+    // defer function with more parameters
+    $defer('printf',"%s-%s",10,12);
+    // defer with anonymous function
+    $defer(function (){});
+    $func = function (){};
+    $defer($func);
+    //defer method
+    $foo = new Foo();
+    $defer([$foo,'myMethod']);
 }
 a();
 ```
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 9aaee1f..2545e75 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,8 @@
   "license": "Apache-2.0",
   "description": "A defer function defers the execution of a function until the surrounding function returns.",
   "keywords": [
-    "php","defer"
+    "php",
+    "defer"
   ],
   "require": {
     "php": ">=8.1"
@@ -19,7 +20,9 @@
     "psr-4": {
       "Defer\\": "src/"
     },
-    "files": ["shortcuts.php"]
+    "files": [
+      "shortcuts.php"
+    ]
   },
   "autoload-dev": {
     "psr-4": {
diff --git a/examples/example1.php b/examples/example1.php
index bae2b86..d34576a 100644
--- a/examples/example1.php
+++ b/examples/example1.php
@@ -6,8 +6,8 @@
  * Time: 10:15
  */
 
-require_once __DIR__.'/../Defer.php';
-require_once __DIR__.'/../shortcuts.php';
+require_once __DIR__ . '/../Defer.php';
+require_once __DIR__ . '/../shortcuts.php';
 
 /**
  * @param $dstName
@@ -15,48 +15,51 @@
  *
  * @return bool
  */
-function copyFileBad($srcName, $dstName){
-	$src = fopen($srcName, 'r');
-	if ($src===false){
-		return false;
-	}
-	$dst = fopen($dstName, 'w');
-	if ($dst===false){
-		return false;
-	}
-	$size=filesize($srcName);
-	while($size>0){
-		$s = $size>1000?1000:$size;
-		fwrite($dst,fread($src,$s));
-		$size-=1000;
-	}
+function copyFileBad($srcName, $dstName)
+{
+    $src = fopen($srcName, 'r');
+    if ($src === false) {
+        return false;
+    }
+    $dst = fopen($dstName, 'w');
+    if ($dst === false) {
+        return false;
+    }
+    $size = filesize($srcName);
+    while ($size > 0) {
+        $s = $size > 1000 ? 1000 : $size;
+        fwrite($dst, fread($src, $s));
+        $size -= 1000;
+    }
 
-	fclose($src);
-	fclose($dst);
-	return true;
+    fclose($src);
+    fclose($dst);
+    return true;
 }
-function copyFile($srcName, $dstName){
-	$src = fopen($srcName, 'r');
-	if ($src===false){
-		return false;
-	}
-	$defer = defer(fclose(...),$src);
 
-	$dst = fopen($dstName, 'w');
-	if ($dst===false){
-		return false;
-	}
-    $defer(fclose(...),$dst);
+function copyFile($srcName, $dstName)
+{
+    $src = fopen($srcName, 'r');
+    if ($src === false) {
+        return false;
+    }
+    $defer = defer(fclose(...), $src);
 
-	$size=filesize($srcName);
-	while($size>0){
-		$s = $size>1000?1000:$size;
-		$b=fwrite($dst,fread($src,$s));
-		if ($s!=$b){
-			return false;
-		}
-		$size-=1000;
-	}
+    $dst = fopen($dstName, 'w');
+    if ($dst === false) {
+        return false;
+    }
+    $defer(fclose(...), $dst);
 
-	return true;
+    $size = filesize($srcName);
+    while ($size > 0) {
+        $s = $size > 1000 ? 1000 : $size;
+        $b = fwrite($dst, fread($src, $s));
+        if ($s != $b) {
+            return false;
+        }
+        $size -= 1000;
+    }
+
+    return true;
 }
diff --git a/examples/test.php b/examples/test.php
index fa2343f..a4ad53d 100644
--- a/examples/test.php
+++ b/examples/test.php
@@ -6,19 +6,24 @@
  * Time: 10:35
  */
 
-require_once __DIR__.'/../Defer.php';
-require_once __DIR__.'/../shortcuts.php';
+require_once __DIR__ . '/../Defer.php';
+require_once __DIR__ . '/../shortcuts.php';
 
-echo "start".PHP_EOL;
-function foo($a){
-	echo "in defer 3-{$a}".PHP_EOL;
+echo "start" . PHP_EOL;
+function foo($a)
+{
+    echo "in defer 3-{$a}" . PHP_EOL;
 }
-function a() {
-	echo "before defer".PHP_EOL;
-	$defer = defer( "foo",1);
-    $defer( "foo",2);
-    $defer("foo",3);
-	echo "after defer".PHP_EOL;
-};
+
+function a()
+{
+    echo "before defer" . PHP_EOL;
+    $defer = defer("foo", 1);
+    $defer("foo", 2);
+    $defer("foo", 3);
+    echo "after defer" . PHP_EOL;
+}
+
+;
 a();
-echo "end".PHP_EOL;
\ No newline at end of file
+echo "end" . PHP_EOL;
\ No newline at end of file
diff --git a/examples/test2.php b/examples/test2.php
index e3569c9..54a3aaf 100644
--- a/examples/test2.php
+++ b/examples/test2.php
@@ -1,5 +1,7 @@
 <?php
+
 namespace test;
+
 /**
  * Created by PhpStorm.
  * User: Jozef Môstka
@@ -8,35 +10,43 @@
  */
 
 
-require_once __DIR__.'/../Defer.php';
-require_once __DIR__.'/../shortcuts.php';
+require_once __DIR__ . '/../Defer.php';
+require_once __DIR__ . '/../shortcuts.php';
 
-function a(){
-	$i=0;
-    defer(printf(...),$i);
-	$i++;
+function a()
+{
+    $i = 0;
+    defer(printf(...), $i);
+    $i++;
 }
-a();echo PHP_EOL;
 
-function b(){
+a();
+echo PHP_EOL;
+
+function b()
+{
     $defer = defer();
-	for($i=0;$i<4;$i++){
-        $defer(printf(...),$i);
-	}
+    for ($i = 0; $i < 4; $i++) {
+        $defer(printf(...), $i);
+    }
 }
-b();echo PHP_EOL;
 
-function c() {
-	$i=1;
-	$o=new \stdClass();
-	$o->i=2;
+b();
+echo PHP_EOL;
+
+function c()
+{
+    $i = 1;
+    $o = new \stdClass();
+    $o->i = 2;
     defer(function () use (&$i, $o) {
-		$o->i++;
-		$i++;
-	});
+        $o->i++;
+        $i++;
+    });
 
-	$i++;
-	return [$i,$o];
+    $i++;
+    return [$i, $o];
 }
-list($i,$o) = c();
-echo "{$i}-{$o->i}".PHP_EOL;
\ No newline at end of file
+
+list($i, $o) = c();
+echo "{$i}-{$o->i}" . PHP_EOL;
\ No newline at end of file
diff --git a/shortcuts.php b/shortcuts.php
index 73b6211..1e54842 100644
--- a/shortcuts.php
+++ b/shortcuts.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace {
 
     use Defer\Defer;
diff --git a/src/Defer.php b/src/Defer.php
index 97662bb..ca52144 100644
--- a/src/Defer.php
+++ b/src/Defer.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace Defer;
 
 
@@ -15,7 +16,7 @@ public function __construct(?callable $callback, mixed ...$args)
 
     public function defer(?callable $callback, mixed ...$args): void
     {
-        if($callback === null){
+        if ($callback === null) {
             return;
         }
         $this->callbacks[] = [$callback, $args];;
@@ -32,10 +33,10 @@ function __destruct()
         $this->flush();
     }
 
-    public function flush():void
+    public function flush(): void
     {
-        while([$callback,$args] = array_pop($this->callbacks)){
-            call_user_func_array($callback,$args);
+        while ([$callback, $args] = array_pop($this->callbacks)) {
+            call_user_func_array($callback, $args);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/AnonymousFunctionTest.php b/tests/AnonymousFunctionTest.php
index 09a618a..15869a0 100644
--- a/tests/AnonymousFunctionTest.php
+++ b/tests/AnonymousFunctionTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use Defer\Defer;
@@ -13,17 +14,17 @@
 
 class AnonymousFunctionTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
         $foo = 1;
-        $this->calDefer(function ($param) use(&$foo){
+        $this->calDefer(function ($param) use (&$foo) {
             $foo = $param;
         }, 2);
         $this->assertEquals(2, $foo);
     }
 
-    private function calDefer(callable $method, $param):void
+    private function calDefer(callable $method, $param): void
     {
-        $defer = new Defer($method,$param);
+        $defer = new Defer($method, $param);
     }
 }
\ No newline at end of file
diff --git a/tests/BlankConstructorTest.php b/tests/BlankConstructorTest.php
index ac04cdb..375ee5e 100644
--- a/tests/BlankConstructorTest.php
+++ b/tests/BlankConstructorTest.php
@@ -5,31 +5,31 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
-use Defer\Defer;
 use PHPUnit\Framework\TestCase;
 
 
 class BlankConstructorTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
         $stack = [];
-        $this->calDefer(function($item) use (&$stack){
-            $stack[]=$item;
+        $this->calDefer(function ($item) use (&$stack) {
+            $stack[] = $item;
         });
         $stack[] = "end";
-        for($i=5;$i>=0;$i--){
+        for ($i = 5; $i >= 0; $i--) {
             $this->assertEquals($i, array_shift($stack));
         }
     }
 
-    private function calDefer(callable $callback):void
+    private function calDefer(callable $callback): void
     {
         $defer = defer();
-        for($i=0;$i<5;$i++){
-            $defer->defer($callback,$i);
+        for ($i = 0; $i < 5; $i++) {
+            $defer->defer($callback, $i);
         }
         $defer->defer($callback, $i);
     }
diff --git a/tests/CustomFunctionTest.php b/tests/CustomFunctionTest.php
index 8ac9881..a389eff 100644
--- a/tests/CustomFunctionTest.php
+++ b/tests/CustomFunctionTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use Defer\Defer;
@@ -12,21 +13,22 @@
 
 global $fpp;
 $fpp = 0;
-function foo(int $a):void{
+function foo(int $a): void
+{
     global $fpp;
-    $fpp+=$a;
+    $fpp += $a;
 }
 
 class CustomFunctionTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
         $this->incrementFpp();
         global $fpp;
         $this->assertEquals(1, $fpp);
     }
 
-    private function incrementFpp():void
+    private function incrementFpp(): void
     {
         $defer = new Defer('Defer\Tests\foo', 1);
     }
diff --git a/tests/FlushTest.php b/tests/FlushTest.php
index ce5dc8f..7440d29 100644
--- a/tests/FlushTest.php
+++ b/tests/FlushTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use Defer\Defer;
@@ -13,7 +14,7 @@
 
 class FlushTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
         $foo = 0;
         $this->testDefer($foo);
@@ -21,7 +22,7 @@ public function testBasics():void
         $this->assertSame(1, $foo);
     }
 
-    private function testDefer(int &$foo):void
+    private function testDefer(int &$foo): void
     {
         $defer = new Defer(function () use (&$foo) {
             $foo++;
@@ -33,5 +34,4 @@ private function testDefer(int &$foo):void
     }
 
 
-
 }
\ No newline at end of file
diff --git a/tests/GlobalFunctionTest.php b/tests/GlobalFunctionTest.php
index 6fac9ca..281d41d 100644
--- a/tests/GlobalFunctionTest.php
+++ b/tests/GlobalFunctionTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use Defer\Defer;
@@ -13,16 +14,16 @@
 
 class GlobalFunctionTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
-        $file = fopen(__DIR__.'/test.txt', 'w+');
+        $file = fopen(__DIR__ . '/test.txt', 'w+');
         $this->calDefer($file);
         $this->assertIsClosedResource($file);
-        unlink(__DIR__.'/test.txt');
+        unlink(__DIR__ . '/test.txt');
     }
 
-    private function calDefer($param):void
+    private function calDefer($param): void
     {
-        $defer = new Defer(fclose(...),$param);
+        $defer = new Defer(fclose(...), $param);
     }
 }
\ No newline at end of file
diff --git a/tests/InvokeTest.php b/tests/InvokeTest.php
index 78831e7..6b965b9 100644
--- a/tests/InvokeTest.php
+++ b/tests/InvokeTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use PHPUnit\Framework\TestCase;
diff --git a/tests/ShortcutTest.php b/tests/ShortcutTest.php
index dd52381..34d3794 100644
--- a/tests/ShortcutTest.php
+++ b/tests/ShortcutTest.php
@@ -5,9 +5,9 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
-use Defer\Defer;
 use PHPUnit\Framework\TestCase;
 
 
diff --git a/tests/StackTest.php b/tests/StackTest.php
index c162f06..886e365 100644
--- a/tests/StackTest.php
+++ b/tests/StackTest.php
@@ -5,6 +5,7 @@
  * Date: 27. 8. 2024
  * Time: 14:38
  */
+
 namespace Defer\Tests;
 
 use Defer\Defer;
@@ -13,23 +14,23 @@
 
 class StackTest extends TestCase
 {
-    public function testBasics():void
+    public function testBasics(): void
     {
         $stack = [];
-        $this->calDefer(function($item) use (&$stack){
-            $stack[]=$item;
+        $this->calDefer(function ($item) use (&$stack) {
+            $stack[] = $item;
         });
         $stack[] = "end";
-        for($i=5;$i>=0;$i--){
+        for ($i = 5; $i >= 0; $i--) {
             $this->assertEquals($i, array_shift($stack));
         }
     }
 
-    private function calDefer(callable $callback):void
+    private function calDefer(callable $callback): void
     {
-        $defer = new Defer($callback,0);
-        for($i=1;$i<5;$i++){
-            $defer->defer($callback,$i);
+        $defer = new Defer($callback, 0);
+        for ($i = 1; $i < 5; $i++) {
+            $defer->defer($callback, $i);
         }
         $defer->defer($callback, $i);
     }