I want to check in zend, whether a posted form value 'name' contains a value.For this i have used the following code

one method

if ($this->_getPatram('name') != null ) {
  echo 'field name contains value';
} else {
  echo 'field name contains  no value';
}

second method

if ($this->_hasParam('name')) {
 echo 'field name contains value';
} else {
  echo 'field name contains  no value';
}

output , when submitting the form with the 'name' field contains no value

in first method

field name contains no value (result is correct)

in second method

field name contains value (result is wrong)

So what is the difference between these two ? _hasParam and _getParam