BoolValue

This provides one-way boolean values (aka sticky booleans), to handle cases where a boolean value may be flipped, but just once.

Usage

• valBoolTrue() - Starts off false, will stay true if set to true once.
• valBoolFalse()- Starts off true, will stay false if set to false once.

Illustration

Consider the following loop:

$hasEmpty = false;

foreach($items as $item) {
  if(empty($item)) {
    $hasEmpty = true;
  } 
}

The if is needed to ensure that $hasEmpty is only set to true once. This can be simplified with a boolean true value:

$hasEmpty = valBoolTrue(); // Starts off as false

foreach($items as $item) {
  $hasEmpty->set(empty($item)); // Will stay true if set to true once
}

Once the value has been set to true, it will stay true, even if set to false afterwards. The sister function is valBoolFalse() works in the exact opposite way.