(No version information available, might only be in SVN)
The SplBool class is used to enforce strong typing of the bool type.
SplBool::__default
     SplBool::false
     SplBool::true
     
Example #1 SplBool usage example
<?php
$true = new SplBool(true);
if ($true) {
    echo "TRUE\n";
}
$false = new SplBool;
if ($false) {
    echo "FALSE\n";
}
?>
以上例程会输出:
TRUE