Create arrayHasKeys validator.

README.md

@@ -167,6 +167,7 @@ V::lang('ar');
  * `creditCard` - Field is a valid credit card number
  * `instanceOf` - Field contains an instance of the given class
  * `optional` - Value does not need to be included in data array. If it is however, it must pass validation.
+ * `arrayHasKeys` - Field is an array and contains all specified keys.
 
 **NOTE**: If you are comparing floating-point numbers with min/max validators, you
 should install the [BCMath](http://us3.php.net/manual/en/book.bc.php)
@@ -938,6 +939,23 @@ $v->rules([
 $v->validate();
 ```
 
+## arrayHasKeys fields usage
+
+The `arrayHasKeys` rule ensures that the field is an array and that it contains all the specified keys.
+Returns false if the field is not an array or if no required keys are specified or if some key is missing.
+
+```php
+$v = new Valitron\Validator([
+    'address' => [
+        'name' => 'Jane Doe',
+        'street' => 'Doe Square',
+        'city' => 'Doe D.C.'
+    ]
+]);
+$v->rule(['arrayHasKeys', 'address', ['name', 'street', 'city']);
+$v->validate();
+```
+
 ## Adding Custom Validation Rules
 
 To add your own validation rule, use the `addRule` method with a rule

lang/en.php

@@ -35,4 +35,5 @@ return array(
     'instanceOf'     => "must be an instance of '%s'",
     'containsUnique' => "must contain unique elements only",
     'subset'         => "contains an item that is not in the list",
+    'arrayHasKeys'   => "does not contain all required keys",
 );

src/Valitron/Validator.php

@@ -911,6 +911,23 @@ class Validator
         return true;
     }
 
+    protected function validateArrayHasKeys($field, $value, $params)
+    {
+        if (!is_array($value) || !isset($params[0])) {
+            return false;
+        }
+        $requiredFields = $params[0];
+        if (count($requiredFields) === 0) {
+            return false;
+        }
+        foreach ($requiredFields as $fieldName) {
+            if (!array_key_exists($fieldName, $value)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
     /**
      * Get array of fields and data
      *

tests/Valitron/ValidateTest.php

@@ -2483,6 +2483,72 @@ class ValidateTest extends BaseTestCase
         $v->rule('date', 'data.*.foo');
         $this->assertFalse($v->validate());
     }
+
+    public function testArrayHasKeysTrueIfAllFieldsExist()
+    {
+        $v = new Validator(array(
+            'address' => array(
+                'name' => 'Jane Doe',
+                'street' => 'Doe Square',
+                'city' => 'Doe D.C.'
+            )
+        ));
+        $v->rule('arrayHasKeys', 'address', array('name', 'street', 'city'));
+        $this->assertTrue($v->validate());
+    }
+
+    public function testArrayHasKeysFalseOnMissingField()
+    {
+        $v = new Validator(array(
+            'address' => array(
+                'name' => 'Jane Doe',
+                'street' => 'Doe Square'
+            )
+        ));
+        $v->rule('arrayHasKeys', 'address', array('name', 'street', 'city'));
+        $this->assertFalse($v->validate());
+    }
+
+    public function testArrayHasKeysFalseOnNonArray()
+    {
+        $v = new Validator(array(
+            'address' => 'Jane Doe, Doe Square'
+        ));
+        $v->rule('arrayHasKeys', 'address', array('name', 'street', 'city'));
+        $this->assertFalse($v->validate());
+    }
+
+    public function testArrayHasKeysFalseOnEmptyRequiredFields()
+    {
+        $v = new Validator(array(
+            'address' => array(
+                'lat' => 77.547,
+                'lon' => 16.337
+            )
+        ));
+        $v->rule('arrayHasKeys', 'address', array());
+        $this->assertFalse($v->validate());
+    }
+
+    public function testArrayHasKeysFalseOnUnspecifiedRequiredFields()
+    {
+        $v = new Validator(array(
+            'address' => array(
+                'lat' => 77.547,
+                'lon' => 16.337
+            )
+        ));
+        $v->rule('arrayHasKeys', 'address');
+        $this->assertFalse($v->validate());
+    }
+
+    public function testArrayHasKeysTrueIfMissingAndOptional()
+    {
+        $v = new Validator(array());
+        $v->rule('arrayHasKeys', 'address', array('name', 'street', 'city'));
+        $v->rule('optional', 'address');
+        $this->assertTrue($v->validate());
+    }
 }
 
 function sampleFunctionCallback($field, $value, array $params)