# Class Phalcon\\Validation\\Validator\\PresenceOf
# Class **Phalcon\\Validation\\Validator\\PresenceOf**
*extends* abstract class [*Phalcon\\Validation\\Validator*](#)
*implements*[*Phalcon\\Validation\\ValidatorInterface*](#)
Validates that a value is not null or empty string
```
<pre class="calibre14">```
<?php
use Phalcon\Validation\Validator\PresenceOf;
$validator->add('name', new PresenceOf(array(
'message' => 'The name is required'
)));
```
```
### Methods
public **validate** (*unknown* $validation, *unknown* $field)
Executes the validation
public **\_\_construct** (\[*unknown* $options\]) inherited from Phalcon\\Validation\\Validator
Phalcon\\Validation\\Validator constructor
public **isSetOption** (*unknown* $key) inherited from Phalcon\\Validation\\Validator
Checks if an option is defined
public **hasOption** (*unknown* $key) inherited from Phalcon\\Validation\\Validator
Checks if an option is defined
public **getOption** (*unknown* $key, \[*unknown* $defaultValue\]) inherited from Phalcon\\Validation\\Validator
Returns an option in the validator's options Returns null if the option hasn't set
public **setOption** (*unknown* $key, *unknown* $value) inherited from Phalcon\\Validation\\Validator
Sets an option in the validator
|
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- Abstract class Phalcon\Acl
- Abstract class Phalcon\Acl\Adapter
- Class Phalcon\Acl\Adapter\Memory
- Interface Phalcon\Acl\AdapterInterface
- Class Phalcon\Acl\Exception
- Class Phalcon\Acl\Resource
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- Class Phalcon\Acl\Role
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- Class Phalcon\Annotations\Annotation
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- Class Phalcon\Assets\Inline
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- Class Phalcon\Mvc\Model\Criteria
- Interface Phalcon\Mvc\Model\CriteriaInterface
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- Class Phalcon\Mvc\Model\Manager
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- Interface Phalcon\Mvc\Model\MessageInterface
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- Interface Phalcon\Mvc\Model\MetaDataInterface
- Class Phalcon\Mvc\Model\Query
- Interface Phalcon\Mvc\Model\QueryInterface
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- Interface Phalcon\Mvc\Model\RelationInterface
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- Abstract class Phalcon\Mvc\Model\Resultset
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- Interface Phalcon\Mvc\Model\ResultsetInterface
- Class Phalcon\Mvc\Model\Row
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- Class Phalcon\Mvc\Router
- Class Phalcon\Mvc\Router\Annotations
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- Interface Phalcon\Mvc\Router\GroupInterface
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- Class Phalcon\Mvc\Url
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- Class Phalcon\Mvc\User\Component
- Class Phalcon\Mvc\User\Module
- Class Phalcon\Mvc\User\Plugin
- Class Phalcon\Mvc\View
- Abstract class Phalcon\Mvc\View\Engine
- Interface Phalcon\Mvc\View\EngineInterface
- Class Phalcon\Mvc\View\Exception
- Class Phalcon\Mvc\View\Simple
- Interface Phalcon\Mvc\ViewBaseInterface
- Interface Phalcon\Mvc\ViewInterface
- Abstract class Phalcon\Paginator\Adapter
- Class Phalcon\Paginator\Adapter\Model
- Class Phalcon\Paginator\Adapter\NativeArray
- Class Phalcon\Paginator\Adapter\QueryBuilder
- Interface Phalcon\Paginator\AdapterInterface
- Class Phalcon\Paginator\Exception
- Class Phalcon\Queue\Beanstalk
- Class Phalcon\Queue\Beanstalk\Job
- Final class Phalcon\Registry
- Class Phalcon\Security
- Class Phalcon\Security\Exception
- Abstract class Phalcon\Session
- Abstract class Phalcon\Session\Adapter
- Interface Phalcon\Session\AdapterInterface
- Class Phalcon\Session\Bag
- Interface Phalcon\Session\BagInterface
- Class Phalcon\Session\Exception
- Class Phalcon\Tag
- Class Phalcon\Tag\Exception
- Abstract class Phalcon\Tag\Select
- Abstract class Phalcon\Text
- Abstract class Phalcon\Translate
- Abstract class Phalcon\Translate\Adapter
- Class Phalcon\Translate\Adapter\Csv
- Class Phalcon\Translate\Adapter\Gettext
- Class Phalcon\Translate\Adapter\NativeArray
- Interface Phalcon\Translate\AdapterInterface
- Class Phalcon\Translate\Exception
- Class Phalcon\Validation
- Class Phalcon\Validation\Exception
- Class Phalcon\Validation\Message
- Class Phalcon\Validation\Message\Group
- Interface Phalcon\Validation\MessageInterface
- Abstract class Phalcon\Validation\Validator
- Class Phalcon\Validation\Validator\Alnum
- Class Phalcon\Validation\Validator\Alpha
- Class Phalcon\Validation\Validator\Between
- Class Phalcon\Validation\Validator\Confirmation
- Class Phalcon\Validation\Validator\Digit
- Class Phalcon\Validation\Validator\Email
- Class Phalcon\Validation\Validator\ExclusionIn
- Class Phalcon\Validation\Validator\File
- Class Phalcon\Validation\Validator\Identical
- Class Phalcon\Validation\Validator\InclusionIn
- Class Phalcon\Validation\Validator\Numericality
- Class Phalcon\Validation\Validator\PresenceOf
- Class Phalcon\Validation\Validator\Regex
- Class Phalcon\Validation\Validator\StringLength
- Class Phalcon\Validation\Validator\Uniqueness
- Class Phalcon\Validation\Validator\Url
- Interface Phalcon\Validation\ValidatorInterface
- Class Phalcon\Version
- 参考手册
- 安装（Installation）
- 教程 1：让我们通过例子来学习（Tutorial 1: Let’s learn by example）
- 教程 2：Introducing INVO（Tutorial 2: Introducing INVO）
- 教程 3: Securing INVO
- 教程 4: Using CRUDs
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- Phalcon 开发工具（Phalcon Developer Tools）
- 提高性能：下一步该做什么？（Increasing Performance: What’s next?）
- 单元测试（Unit testing）
- 授权（License）