Cannot use empty array elements in arrays i code example

Example: Cannot use empty array elements in arrays

'security' => array(
			'allowed_ajax_actions' => array(
				'Marker' => array(
					'details' => true,
					'save' => true,
					'delete' => true
				),
				'Category' => array(
					'index' => true
				),
				'Shape' => array(
					'index' => true,
					'add' => true,
					'remove' => true
				)
			),
			'salt' => 'sadaak#+jfo8qanishd2380§$Af#asU§Q(O§HQF3)§',
			'cron_token_import' => 'a90ee59203d52c20807c1b84428d6e053be57b29',
			'cron_token_calculate' => 'dwuofhz2389rhueiofh9782fhiuewfhwgoieus20'
		),