Laravel: Ajax pagination table header generator

TableHeaderGenerator.php

<?php

namespace App\Services;

class TableHeaderGenerator {

	/**
	 * Returns an array for the table view's header data that includes sort links
	 * @param  Array $data array of arrays with keys 'label' and 'col'
	 * @param  string $current_sort
	 * @param string $current_sort_dir
	 * @return Array       Processed array ready for the table view
	 */
	static public function render($data, $current_sort, $current_sort_dir, $sort_link)
	{
		$final = [];
		$final['attributes'] = ['class'=>'header'];

		$cells = [];
		foreach($data as $column_data) {
			$label = $column_data['label'];
			$col = $column_data['col'];
			$cell = [];
			$cell['dom'] = 'th';
			$cell['content'] = '<a onclick="return paginate(this)" href="'.$sort_link.'&sort='.$col.'&sort_dir='.(($current_sort==$col&&$current_sort_dir=='desc')?'asc':'desc').'">'.$label.($current_sort==$col?' <img src="'.asset('images/table/'.$current_sort_dir.'.png').'">':'').'</a>';
			$cells[] = $cell;
		}
		$final['cells'] = $cells;
		return $final;
	}
}
?>