Validating data with a fluent interfaced class
Read more about this approach on my blog post.
- PHP >= 5.5
- intl extension
composer require "hollodotme/fluid-validator" "~1.4.0"
public function isString( $value, $message ) : FluidValidator;
public function isStringOrNull( $value, $message ) : FluidValidator;
public function isNonEmptyString( $value, $message ) : FluidValidator;
public function isNonEmptyStringOrNull( $value, $message ) : FluidValidator;
public function isNotEmpty( $value, $message ) : FluidValidator;
public function isNotEmptyOrNull( $value, $message ) : FluidValidator;
public function isArray( $value, $message ) : FluidValidator;
public function isArrayOrNull( $value, $message ) : FluidValidator;
public function isInt( $value, $message ) : FluidValidator;
public function isIntOrNull( $value, $message ) : FluidValidator;
public function isIntInRange( $value, array $range, $message ) : FluidValidator;
public function isIntInRangeOrNull( $value, array $range, $message ) : FluidValidator;
public function isOneStringOf( $value, array $list, $message ) : FluidValidator;
public function isOneStringOfOrNull( $value, array $list, $message ) : FluidValidator;
public function isSubsetOf( $values, array $list, $message ) : FluidValidator;
public function isSubsetOfOrNull( $values, array $list, $message ) : FluidValidator;
public function isUuid( $value, $message ) : FluidValidator;
public function isUuidOrNull( $value, $message ) : FluidValidator;
public function isEqual( $value1, $value2, $message ) : FluidValidator;
public function isNotEqual( $value1, $value2, $message ) : FluidValidator;
public function isSame( $value1, $value2, $message ) : FluidValidator;
public function isNotSame( $value1, $value2, $message ) : FluidValidator;
public function isNull( $value, $message ) : FluidValidator;
public function isNotNull( $value, $message ) : FluidValidator;
public function matchesRegex( $value, $regex, $message ) : FluidValidator;
public function matchesRegexOrNull( $value, $regex, $message ) : FluidValidator;
public function hasLength( $value, $length, $message ) : FluidValidator;
public function hasLengthOrNull( $value, $length, $message ) : FluidValidator;
public function hasMinLength( $value, $minLength, $message ) : FluidValidator;
public function hasMinLengthOrNull( $value, $minLength, $message ) : FluidValidator;
public function hasMaxLength( $value, $maxLength, $message ) : FluidValidator;
public function hasMaxLengthOrNull( $value, $maxLength, $message ) : FluidValidator;
public function counts( $values, $count, $message ) : FluidValidator;
public function countsOrNull( $values, $count, $message ) : FluidValidator;
public function isEmail( $value, $message ) : FluidValidator;
public function isEmailOrNull( $value, $message ) : FluidValidator;
public function isUrl( $value, $message ) : FluidValidator;
public function isUrlNull( $value, $message ) : FluidValidator;
public function isJson( $value, $message ) : FluidValidator;
public function isJsonOrNull( $value, $message ) : FluidValidator;
public function hasKey( $values, $key, $message ) : FluidValidator;
public function hasKeyOrNull( $values, $key, $message ) : FluidValidator;
public function isDate( $dateString, $format = 'Y-m-d', $message ) : FluidValidator;
public function isDateOrNull( $dateString, $format = 'Y-m-d', $message ) : FluidValidator;
public function isTrue( $value, $message ) : FluidValidator;
public function isTrueOrNull( $value, $message ) : FluidValidator;
public function isFalse( $value, $message ) : FluidValidator;
public function isFalseOrNull( $value, $message ) : FluidValidator;Alvailable since version 1.1.0:
public function checkIf( $expression, $continue ) : FluidValidator;
public function ifIsString( $value, $continue ) : FluidValidator;
public function ifIsStringOrNull( $value, $continue ) : FluidValidator;
public function ifIsNonEmptyString( $value, $continue ) : FluidValidator;
public function ifIsNonEmptyStringOrNull( $value, $continue ) : FluidValidator;
public function ifIsNotEmpty( $value, $continue ) : FluidValidator;
public function ifIsNotEmptyOrNull( $value, $continue ) : FluidValidator;
public function ifIsArray( $value, $continue ) : FluidValidator;
public function ifIsArrayOrNull( $value, $continue ) : FluidValidator;
public function ifIsInt( $value, $continue ) : FluidValidator;
public function ifIsIntOrNull( $value, $continue ) : FluidValidator;
public function ifIsIntInRange( $value, array $range, $continue ) : FluidValidator;
public function ifIsIntInRangeOrNull( $value, array $range, $continue ) : FluidValidator;
public function ifIsOneStringOf( $value, array $list, $continue ) : FluidValidator;
public function ifIsOneStringOfOrNull( $value, array $list, $continue ) : FluidValidator;
public function ifIsSubsetOf( $values, array $list, $continue ) : FluidValidator;
public function ifIsSubsetOfOrNull( $values, array $list, $continue ) : FluidValidator;
public function ifIsUuid( $value, $continue ) : FluidValidator;
public function ifIsUuidOrNull( $value, $continue ) : FluidValidator;
public function ifIsEqual( $value1, $value2, $continue ) : FluidValidator;
public function ifIsNotEqual( $value1, $value2, $continue ) : FluidValidator;
public function ifIsSame( $value1, $value2, $continue ) : FluidValidator;
public function ifIsNotSame( $value1, $value2, $continue ) : FluidValidator;
public function ifIsNull( $value, $continue ) : FluidValidator;
public function ifIsNotNull( $value, $continue ) : FluidValidator;
public function ifMatchesRegex( $value, $regex, $continue ) : FluidValidator;
public function ifMatchesRegexOrNull( $value, $regex, $continue ) : FluidValidator;
public function ifHasLength( $value, $length, $continue ) : FluidValidator;
public function ifHasLengthOrNull( $value, $length, $continue ) : FluidValidator;
public function ifHasMinLength( $value, $minLength, $continue ) : FluidValidator;
public function ifHasMinLengthOrNull( $value, $minLength, $continue ) : FluidValidator;
public function ifHasMaxLength( $value, $maxLength, $continue ) : FluidValidator;
public function ifHasMaxLengthOrNull( $value, $maxLength, $continue ) : FluidValidator;
public function ifCounts( $values, $count, $continue ) : FluidValidator;
public function ifCountsOrNull( $values, $count, $continue ) : FluidValidator;
public function ifIsEmail( $value, $continue ) : FluidValidator;
public function ifIsEmailOrNull( $value, $continue ) : FluidValidator;
public function ifIsUrl( $value, $continue ) : FluidValidator;
public function ifIsUrlNull( $value, $continue ) : FluidValidator;
public function ifIsJson( $value, $continue ) : FluidValidator;
public function ifIsJsonOrNull( $value, $continue ) : FluidValidator;
public function ifHasKey( $values, $key, $continue ) : FluidValidator;
public function ifHasKeyOrNull( $values, $key, $continue ) : FluidValidator;
public function ifIsDate( $dateString, $format = 'Y-m-d', $continue ) : FluidValidator;
public function ifIsDateOrNull( $dateString, $format = 'Y-m-d', $continue ) : FluidValidator;
public function ifIsTrue( $value, $continue ) : FluidValidator;
public function ifIsTrueOrNull( $value, $continue ) : FluidValidator;
public function ifIsFalse( $value, $continue ) : FluidValidator;
public function ifIsFalseOrNull( $value, $continue ) : FluidValidator;Available since version 1.3.0:
public function ifPassed( $continue ) : FluidValidator;# Resets the validator to its initial state
public function reset() : FluidValidator;
# Returns TRUE, if all validations have passed, otherwise FALSE
public function passed() : bool;
# Returns TRUE, if one or more validations have failed, otherwise FALSE
public function failed() : bool;
# Returns the the value for $var from data provider, or $var if no data provider is set.
public function getValue( $var ) : mixed;
# Returns an array of messages collected from failed validations
public function getMessages() : array;# Processes all validations regardless of failed ones
CheckMode::CONTINUOUS
# Processes all validations until the first one failed
CheckMode::STOP_ON_FIRST_FAILScalarListMessageCollectorfor collecting scalar message values (default, if none is provided)GroupedListMessageCollectorfor collecting scalar key / scalar value messages grouped by key
<?php
namespace My\NS;
use hollodotme\FluidValidator\CheckMode;
use hollodotme\FluidValidator\FluidValidator;
$stringValue = 'test';
$arrayValue = [ 'test', 'test2' ];
$invalidEmail = 'email@example@example.com';
$optionalBirthdate = null;
$validator = new FluidValidator( CheckMode::CONTINUOUS );
$validator->isNonEmptyString( $stringValue, 'This is not a string' )
->isArray( $arrayValue, 'Not an array' )
->isOneStringOf( $stringValue, $arrayValue, 'Is not part of the array' )
->isEmail( $invalidEmail, 'This email address is invalid' )
->isDateOrNull( $optionalBirthdate, 'Y-m-d', 'Birthdate is invalid' );
if ( $validator->failed() )
{
print_r( $validator->getMessages() );
}Prints:
Array
(
[0] => This email address is invalid
)
Available since version 1.1.0.
You often want to check a value only if a previous condition is true.
Therefore the generic checkIf method was added, alongside with if-methods for each check method.
Example:
<?php
namespace My\NS;
use hollodotme\FluidValidator\CheckMode;
use hollodotme\FluidValidator\FluidValidator;
$stringValue = 'test';
$arrayValue = [ 'test', 'test2' ];
$invalidEmail = 'email@example@example.com';
$birthdate = 'not-a-date';
$validator = new FluidValidator( CheckMode::CONTINUOUS );
$validator->isNonEmptyString( $stringValue, 'This is not a string' )
->isArray( $arrayValue, 'Not an array' )
->isOneStringOf( $stringValue, $arrayValue, 'Is not part of the array' )
# execute next 2 check methods, if $birthdate is a non-empty string
# skip next 2 check methods otherwise
->ifIsNonEmptyString( $birthdate, 2 )
->isEqual( $birthdate, 'not-a-date', 'Is not equal' )
->isDate( $birthdate, 'Y-m-d', 'Birthdate is invalid' )
->isEmail( $invalidEmail, 'This email address is invalid' )
# execute next 1 check method, if all previous checks passed so far
# skip next 1 check method otherwise
->ifPassed( 1 )
->isNonEmptyString( '', 'String is empty' )
->isEqual( 'testing', $stringValue, 'Strings are not equal' );
if ( $validator->failed() )
{
print_r( $validator->getMessages() );
}Prints:
Array
(
[0] => Birthdate is invalid
[1] => This email address is invalid
[2] => Strings are not equal
)
If you have an object covering a data structure like an array or something like that, e.g. a request object,
you can tell the FluidValidator to use this object to retrieve the values to validate from it.
All you need to do is to implement the hollodotme\FluidValidator\Interfaces\ProvidesValuesToValidate
interface' method getValueToValidate( $key ).
<?php
namespace My\NS;
use hollodotme\FluidValidator\FluidValidator;
use hollodotme\FluidValidator\CheckMode;
use hollodotme\FluidValidator\Interfaces\ProvidesValuesToValidate;
class Request implements ProvidesValuesToValidate
{
/** @var array */
private $requestData;
/**
* @param array $requestData
*/
public function __construct( array $requestData )
{
$this->requestData = $requestData;
}
/*
... some accessor methods
*/
/**
* Implements the ProvidesValuesToValidate interface
*
* @param mixed $key
*
* @return mixed|null
*/
public function getValueToValidate( $key )
{
return isset($this->requestData[ $key ]) ? $this->requestData[ $key ] : null;
}
}
$requestData = [
'name' => 'Your Name',
'language' => 'de',
'email' => 'email@example@example.com',
'birthdate' => '1980-01-01',
];
$request = new Request( $requestData );
$validator = new FluidValidator( CheckMode::CONTINUOUS, $request );
$validator->isNonEmptyString( 'name', 'Name is empty.' )
->isOneStringOf( 'language', [ 'de', 'en' ], 'Invalid language.' )
->isEmail( 'email', 'This email address is invalid' )
->isDateOrNull( 'birthdate', 'Y-m-d', 'Birthdate is invalid' );
if ( $validator->failed() )
{
print_r( $validator->getMessages() );
}Available since version 1.2.0.
<?php
namespace My\NS;
use hollodotme\FluidValidator\CheckMode;
use hollodotme\FluidValidator\FluidValidator;
use hollodotme\FluidValidator\MessageCollectors\ScalarListMessageCollector;
$stringValue = 'test';
$arrayValue = [ 'test', 'test2' ];
$invalidEmail = 'email@example@example.com';
$optionalBirthdate = null;
$messageCollector = new ScalarListMessageCollector();
$validator = new FluidValidator( CheckMode::CONTINUOUS, null, $messageCollector );
$validator->isNonEmptyString( $stringValue, 'This is not a string' )
->isArray( $arrayValue, 'Not an array' )
->isOneStringOf( $stringValue, $arrayValue, 'Is not part of the array' )
->isEmail( $invalidEmail, 'This email address is invalid' )
->isDateOrNull( $optionalBirthdate, 'Y-m-d', 'Birthdate is invalid' );
if ( $validator->failed() )
{
print_r( $validator->getMessages() );
}Prints:
Array
(
[0] => This email address is invalid
)
Note: Behaviour is the same as in the basic usage example above.
This collector expects messages to be an assoc. array with scalar keys and values.
<?php
namespace My\NS;
use hollodotme\FluidValidator\CheckMode;
use hollodotme\FluidValidator\FluidValidator;
use hollodotme\FluidValidator\MessageCollectors\GroupedListMessageCollector;
$stringValue = 'test';
$arrayValue = [ 'test', 'test2' ];
$invalidEmail = 'email@example@example.com';
$optionalBirthdate = null;
$messageCollector = new GroupedListMessageCollector();
$validator = new FluidValidator( CheckMode::CONTINUOUS, null, $messageCollector );
$validator->isNonEmptyString( '', [ 'string' => 'String is empty' ] )
->isArray( '', [ 'list' => 'Not an array' ] )
->isOneStringOf( 'test3', $arrayValue, [ 'list' => 'Is not part of the array' ] )
->isEmail( $invalidEmail, [ 'email' => 'This email address is invalid' ] )
->isDate( $optionalBirthdate, 'Y-m-d', [ 'birthdate' => 'Birthdate is invalid' ] );
if ( $validator->failed() )
{
print_r( $validator->getMessages() );
}Prints:
Array
(
[string] => Array (
[0] => This email address is invalid
),
[list] => Array (
[0] => Not an array
[1] => Is not part of the array
),
[email] => Array (
[0] => This email address is invalid
),
[birthdate] => Array (
[0] => Birthdate is invalid
)
)
Note:
- The "list" key is given twice, so 2 messages were grouped under this key.
- The value for a group key is always an array with numeric keys
For a custom implementation of a message collector, simply create a class that implements
the hollodotme\FluidValidator\Interfaces\CollectsMessages interface.
<?php
namespace My\NS;
use hollodotme\FluidValidator\Interfaces\CollectsMessages;
class MyMessageCollector implements CollectsMessages
{
/** @var array */
private $messages = [];
/**
* @param mixed $message
*
* @return bool
*/
public function isMessageValid( $message )
{
// Check for a valid type or format of your expected messages
// Example:
return is_string( $message );
}
/**
* @param mixed $message
*/
public function addMessage( $message )
{
// Add a message to your collection
// Example:
$this->messages[] = $message;
}
public function clearMessages()
{
// Clear the message list
// Example:
$this->messages = [];
}
/**
* @return array
*/
public function getMessages()
{
// Provide the collected messages
// Example:
return $this->messages;
}
}Internally all validation and conditional methods are mapped to protected check methods returning a boolean.
TRUE if the check has passed, FALSE otherwise.
So extending FluidValidator is very simple.
Let's add a method that checks for a valid postal address.
<?php
namespace My\NS;
use hollodotme\FluidValidator\FluidValidator;
class MyFluidValidator extends FluidValidator
{
/**
* @param string $street
* @param string $streetNumber
* @param string $zipCode
* @param string $city
*
* @return bool
*/
protected function checkIsPostalAddress( $street, $streetNumber, $zipCode, $city )
{
$validPostalAddress = true;
# Simple formal checks first
# You can use existing check methods here
$validPostalAddress &= $this->checkIsNonEmptyString( $street );
$validPostalAddress &= $this->checkMatchesRegex( $streetNumber, "#^[0-9a-z\- ]$#i" );
$validPostalAddress &= $this->checkMatchesRegex( $zipCode, "#^[0-9]{5}$#" );
$validPostalAddress &= $this->checkIsNonEmptyString( $city );
if ( (bool)$validPostalAddress )
{
# Semantic check of postal address
# Fetch real values, if a data provider is used...
$streetValue = $this->getValue( $street );
$streetNumberValue = $this->getValue( $streetNumber );
$zipCodeValue = $this->getValue( $zipCode );
$cityValue = $this->getValue( $city );
# Assuming you have a postal address validator doing the semantic check
$validator = new PostalAddressValidator( $street, $streetNumber, $zipCode, $city );
$validPostalAddress = $validator->isValid();
}
return (bool)$validPostalAddress;
}
}Now you're able to use this as a validation method with an additional message parameter and as a conditional method with an additional continue parameter:
<?php
$myFluidValidator = new MyFluidValidator();
# As validation method
$myFluidValidator->isPostalAddress(
'MyStreet', '123 a', '01234', 'MyCity',
'Address is not valid'
);
# As conditional method
$myFluidValidator->ifIsPostalAddress(
'MyStreet', '123 a', '01234', 'MyCity',
3
);
/** Skip next 3 methods, if it is not a valid postal address **/To have better auto completion in your IDE, add the relevant method signatures to the head phpdoc of your class.
<?php
namespace My\NS;
use hollodotme\FluidValidator\FluidValidator;
/**
* Class MyFluidValidator
* @package My\NS;
* METHODSTART
* @method MyFluidValidator isPostalAddress($street, $streetNumber, $zipCode, $city, $message)
* @method MyFluidValidator ifIsPostalAddress($street, $streetNumber, $zipCode, $city, $continue)
* METHODEND
*/
class MyFluidValidator extends FluidValidator
{
/* ... */
}