How can scope affect the behavior of boolean variables in PHP?

The scope of a boolean variable in PHP can affect its behavior by determining where the variable can be accessed and modified within the code. To ensure that a boolean variable is accessible and modifiable within a specific scope, it should be declared with the correct scope (e.g., global or within a function). By properly defining the scope of a boolean variable, you can control its behavior and prevent unexpected results.

// Global scope
$globalBoolean = true;

function testScope() {
    // Local scope
    $localBoolean = false;
    
    // Accessing global boolean variable
    global $globalBoolean;
    
    // Modifying global boolean variable
    $globalBoolean = !$globalBoolean;
    
    echo "Local boolean: $localBoolean\n";
    echo "Global boolean: $globalBoolean\n";
}

testScope();