What are some common pitfalls when using objects in PHP scripts?

One common pitfall when using objects in PHP scripts is not properly checking if an object property or method exists before accessing it. This can lead to errors if the property or method doesn't exist, causing the script to break. To avoid this, always use the isset() function or property_exists() method to check if the property or method exists before trying to access it.

// Check if a property exists before accessing it
if (property_exists($object, 'property')) {
    $value = $object->property;
    // Do something with $value
}

// Check if a method exists before calling it
if (method_exists($object, 'method')) {
    $object->method();
}