Validators

Alnum

Zend\I18n\Validator\Alnum allows you to validate if a given value contains only alphabetical characters and digits. There is no length limitation for the input you want to validate.

Basic Usage

$validator = new Zend\I18n\Validator\Alnum();

if ($validator->isValid('Abcd12')) {
    // value contains only allowed chars
} else {
    // false
}

Using Whitespace

By default, whitespace is not accepted as it is not part of the alphabet. However, if you want to validate complete sentences or phrases, you may need to allow whitespace; this can be done via the allowWhiteSpace option, either at instantiation or afterwards via the setAllowWhiteSpace() method.

$validator = new Zend\I18n\Validator\Alnum(['allowWhiteSpace' => true]);

if ($validator->isValid('Abcd and 12')) {
    // value contains only allowed chars
} else {
    // false
}

$validator = new Zend\I18n\Validator\Alnum();
$validator->setAllowWhiteSpace(true);

if ($validator->isValid('Abcd and 12')) {
    // value contains only allowed chars
} else {
    // false
}

Get Current Value

To get the current value of this option, use the getAllowWhiteSpace() method.

$validator = new Zend\I18n\Validator\Alnum(['allowWhiteSpace' => true]);

var_dump($validator->getAllowWhiteSpace()); // true

Default Value

The default value of this option is false that means whitespace characters are not allowed.

Using different Languages

Several languages supported by PHP's internationalization extension (ext/intl) use alphabets where characters are formed from multiple bytes, including Korean, Japanese, and Chinese. Such languages therefore are unsupported with regards to the Alnum validator.

When using the Alnum validator with these languages, the input will be validated using the English alphabet.