What is the significance of the error "Notice: Trying to get property of non-object" in PHP and how can it be resolved?

The error "Notice: Trying to get property of non-object" in PHP occurs when you are trying to access a property of a variable that is not an object. This typically happens when trying to access a property of a variable that is not initialized as an object or is null. To resolve this issue, you should check if the variable is an object before trying to access its properties.

// Check if the variable is an object before accessing its properties
if(is_object($variable)){
    $property_value = $variable->property_name;
} else {
    // Handle the case where the variable is not an object
    $property_value = null;
}