v::notEmpty()
Validates if the given input is not empty or in other words is input mandatory and
required. This function also takes whitespace into account, use noWhitespace()
if no spaces or linebreaks and other whitespace anywhere in the input is desired.
v::stringType()->notEmpty()->validate(''); // falseNull values are empty:
v::notEmpty()->validate(null); // falseNumbers:
v::intVal()->notEmpty()->validate(0); // falseEmpty arrays:
v::arrayVal()->notEmpty()->validate([]); // falseWhitespace:
v::stringType()->notEmpty()->validate(' '); //false
v::stringType()->notEmpty()->validate("\t \n \r"); //falseSee also: