Online PHP editor | output for cqM0B

<?php $settings = []; var_dump((array) (!empty($settings['css file']) ? $settings['css file'] : array())); $settings['css file'] = NULL; var_dump((array) (!empty($settings['css file']) ? $settings['css file'] : array())); $settings['css file'] = []; var_dump((array) (!empty($settings['css file']) ? $settings['css file'] : array())); $settings['css file'] = ['value']; var_dump((array) (!empty($settings['css file']) ? $settings['css file'] : array())); $settings['css file'] = 'string'; var_dump((array) (!empty($settings['css file']) ? $settings['css file'] : array()));