Парсит только первые 2 страницы

<?php  
 header('Content-type: text/html; charset=utf-8'); 
 
 require 'phpQuery-onefile.php'; 
 
function parser ($url,$start,$end) { 
 
	if ($start < $end) { 
	 
		$file = file_get_contents($url); 
		$doc = phpQuery::newDocument($file); 
 
			foreach ($doc->find('.product-list') as $position) { 
				$position = pq($position); 
 
				$articul = $position->find('.name > span:even(1)')->text(); 
				$price = $position->find('.actions .price')->html(); 
 
				// echo "<link rel='stylesheet' href='style.css'>"; 
				echo '<pre>';  
				print_r($articul); 
				print_r($price); 
				echo '</pre>';	 
			} 
				$next = $doc->find('.pagination li a')->attr('href'); 
 
		if ( !empty($next) ) { 
			$start++; 
			parser($next, $start, $end); 
		} 
	}	 
} 
 
 
 
$url = "https://www.agro-center.com.ua/combines-a/spare-parts-for-grain-harvesters/john-deere-c/"; 
$start = 0; 
$end = 4; 
parser($url,$start,$end); 
 
phpQuery::unloadDocuments();