Added accepted_if validation rule

src/Illuminate/Validation/Concerns/ValidatesAttributes.php

@@ -41,6 +41,30 @@ public function validateAccepted($attribute, $value)
         return $this->validateRequired($attribute, $value) && in_array($value, $acceptable, true);
     }
 
+    /**
+     * Validate that an attribute was "accepted" when another attribute has a given value.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  mixed  $parameters
+     * @return bool
+     */
+    public function validateAcceptedIf($attribute, $value, $parameters)
+    {
+
+        $acceptable = ['yes', 'on', '1', 1, true, 'true'];
+
+        $this->requireParameterCount(2, $parameters, 'accepted_if');
+
+        [$values, $other] = $this->parseDependentRuleParameters($parameters);
+
+        if (in_array($other, $values, is_bool($other) || is_null($other))) {
+            return $this->validateRequired($attribute, $value) && in_array($value, $acceptable, true);
+        }
+
+        return true;
+    }
+
     /**
      * Validate that an attribute is an active URL.
      *

src/Illuminate/Validation/Validator.php

@@ -201,6 +201,7 @@ class Validator implements ValidatorContract
      */
     protected $implicitRules = [
         'Accepted',
+        'AcceptedIf',
         'Filled',
         'Present',
         'Required',
@@ -231,6 +232,7 @@ class Validator implements ValidatorContract
         'Gte',
         'Lt',
         'Lte',
+        'AcceptedIf',
         'RequiredIf',
         'RequiredUnless',
         'RequiredWith',

tests/Validation/ValidationValidatorTest.php

@@ -1771,6 +1771,44 @@ public function testValidateAccepted()
         $this->assertTrue($v->passes());
     }
 
+    public function testValidateAcceptedIf()
+    {
+
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans, ['foo' => 'no', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => null, 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => 0, 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => false, 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'false', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'yes', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'on', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => '1', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => 1, 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => true, 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'true', 'bar' => 'aaa'], ['foo' => 'accepted_if:bar,aaa']);
+        $this->assertTrue($v->passes());         
+    }
+
     public function testValidateEndsWith()
     {
         $trans = $this->getIlluminateArrayTranslator();