Early return sniff

README.md

@@ -33,6 +33,7 @@ exceptions/differences/extensions (:white_check_mark: are the implemented sniffs
 - :white_check_mark: Assignment in condition is not allowed
 - :white_check_mark: Use parentheses when creating new instances that do not require arguments `$foo = new Foo()`
 - :white_check_mark: Use Null Coalesce Operator `$foo = $bar ?? $baz`
+- :white_check_mark: Use early return
 
 For full reference of enforcements, go through `lib/Doctrine/ruleset.xml` where each sniff is briefly described.
 

lib/Doctrine/ruleset.xml

@@ -132,6 +132,8 @@
     <rule ref="SlevomatCodingStandard.ControlStructures.DisallowYodaComparison"/>
     <!-- Forbid weak comparisons -->
     <rule ref="SlevomatCodingStandard.ControlStructures.DisallowEqualOperators"/>
+    <!-- Require usage of early exit -->
+    <rule ref="SlevomatCodingStandard.ControlStructures.EarlyExit"/>
     <!-- Require language constructs without parentheses -->
     <rule ref="SlevomatCodingStandard.ControlStructures.LanguageConstructWithParentheses"/>
     <!-- Require new instances with parentheses -->

tests/expected_report.txt

@@ -4,6 +4,7 @@ PHP CODE SNIFFER REPORT SUMMARY
 FILE                                                  ERRORS  WARNINGS
 ----------------------------------------------------------------------
 tests/input/concatenation_spacing.php                 24      0
+tests/input/EarlyReturn.php                           4       0
 tests/input/example-class.php                         19      0
 tests/input/forbidden-comments.php                    4       0
 tests/input/forbidden-functions.php                   3       0
@@ -14,9 +15,9 @@ tests/input/return_type_on_closures.php               21      0
 tests/input/return_type_on_methods.php                17      0
 tests/input/test-case.php                             6       0
 ----------------------------------------------------------------------
-A TOTAL OF 121 ERRORS AND 0 WARNINGS WERE FOUND IN 10 FILES
+A TOTAL OF 125 ERRORS AND 0 WARNINGS WERE FOUND IN 11 FILES
 ----------------------------------------------------------------------
-PHPCBF CAN FIX 106 OF THESE SNIFF VIOLATIONS AUTOMATICALLY
+PHPCBF CAN FIX 110 OF THESE SNIFF VIOLATIONS AUTOMATICALLY
 ----------------------------------------------------------------------
 
 

tests/fixed/EarlyReturn.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Example;
+
+class EarlyReturn
+{
+    public function bar() : bool
+    {
+        if ($bar === 'bar') {
+            return true;
+        }
+
+        return false;
+    }
+
+    public function foo() : ?string
+    {
+        foreach ($itens as $item) {
+            if (! $item->isItem()) {
+                return 'There is an item that is not an item';
+            }
+
+            continue;
+        }
+
+        return null;
+    }
+
+    public function baz() : string
+    {
+        if ($number > 0) {
+            return 'Number is grater then 0';
+        }
+
+        exit;
+    }
+
+    public function quoox() : bool
+    {
+        if (true !== 'true') {
+            return false;
+        }
+
+        if (false === false) {
+            return true;
+        }
+
+        return true;
+    }
+}

tests/input/EarlyReturn.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Example;
+
+class EarlyReturn
+{
+    public function bar() : bool
+    {
+        if ($bar === 'bar') {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public function foo() : ?string
+    {
+        foreach ($itens as $item) {
+            if (! $item->isItem()) {
+                return 'There is an item that is not an item';
+            } else {
+                continue;
+            }
+        }
+
+        return null;
+    }
+
+    public function baz() : string
+    {
+        if ($number > 0) {
+            return 'Number is grater then 0';
+        } else {
+            exit;
+        }
+    }
+
+    public function quoox() : bool
+    {
+        if (true === 'true') {
+            if (false === false) {
+                return true;
+            }
+        } else {
+            return false;
+        }
+
+        return true;
+    }
+}