/**
* Returns true if and only if $value only contains digit characters
*
* @param string $value
* @return boolean
*/
public function isValid($value)
{
if (!is_string($value) && !is_int($value) && !is_float($value)) {
$this->_error(self::INVALID);
return false;
}
$this->_setValue((string) $value);
if ('' === $this->_value) {
$this->_error(self::STRING_EMPTY);
return false;
}
if (null === self::$_filter) {
self::$_filter = new \Zend\Filter\Digits();
}
if ($this->_value !== self::$_filter->filter($this->_value)) {
$this->_error(self::NOT_DIGITS);
return false;
}
return true;
}
/**
* Returns true if and only if $value only contains digit characters
*
* @param string $value
* @return bool
*/
public function isValid($value)
{
if (!is_string($value) && !is_int($value) && !is_float($value)) {
$this->error(self::INVALID);
return false;
}
$this->setValue((string) $value);
if ('' === $this->getValue()) {
$this->error(self::STRING_EMPTY);
return false;
}
if (null === static::$filter) {
static::$filter = new DigitsFilter();
}
if ($this->getValue() !== static::$filter->filter($this->getValue())) {
$this->error(self::NOT_DIGITS);
return false;
}
return true;
}
