php

 function checkEmpty ($item, $errormessage, &$error){
	if (!empty($_POST[$item])){
		$name = $_POST[$item];
	}
	else{
		$error[] = $errormessage;
	}
}

# Initialize empty array.
$errorstack = array();

# Call checkEmpty with as 3th parameter $errorstack.
checkEmpty('name', "Je hebt je naam niet ingevuld", $errorstack);