parallel-scraping-logic.php

<?
$from = null; 
$to = null; 
 
if (isset($_GET["from"]) && is_numeric($_GET["from"])) { 
	$from = $_GET["from"]; 
} 
 
if (isset($_GET["to"]) && is_numeric($_GET["to"])) { 
	$to = $_GET["to"]; 
} 
 
if (is_null($from) || is_null($to) || $from > $to) { 
	die("Invalid from and to parameters!"); 
} 
 
// scrape only the pagination pages whose number goes 
// from "$from" to "$to" 
for ($paginationNumber = $from; $paginationNumber <= $to; $paginationNumber++) { 
	// scraping logic... 
} 
 
// write the data scraped to a database/file