Unable to grab content traversing multiple pages - php

Question

I've written a script in php to scrape the titles and its links from a webpage. The webpage displays it's content traversing multiple pages. My below script can parse the titles and links from it's landing page.
How can I rectify my existing script to get data from multiple pages, as in upto 10 pages?
This is my attempt so far:
<?php
include "simple_html_dom.php";
$link = "https://stackoverflow.com/questions/tagged/web-scraping?page=2";
function get_content($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$htmlContent = curl_exec($ch);
curl_close($ch);
$dom = new simple_html_dom();
$dom->load($htmlContent);
foreach($dom->find('.question-summary') as $file){
$itemTitle = $file->find('.question-hyperlink', 0)->innertext;
$itemLink = $file->find('.question-hyperlink', 0)->href;
echo "{$itemTitle},{$itemLink}<br>";
}
}
get_content($link);
?>
The site increments it's pages like ?page=2,?page=3 e.t.c.

Answer 1

This is how I got success (coping with Nima's suggestion).
<?php
include "simple_html_dom.php";
$link = "https://stackoverflow.com/questions/tagged/web-scraping?page=";
function get_content($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$htmlContent = curl_exec($ch);
curl_close($ch);
$dom = new simple_html_dom();
$dom->load($htmlContent);
foreach($dom->find('.question-summary') as $file){
$itemTitle = $file->find('.question-hyperlink', 0)->innertext;
$itemLink = $file->find('.question-hyperlink', 0)->href;
echo "{$itemTitle},{$itemLink}<br>";
}
}
for($i = 1; $i<10; $i++){
get_content($link.$i);
}
?>

Answer 2

Here is how i would do it with XPath:
$url = 'https://stackoverflow.com/questions/tagged/web-scraping';
$dom = new DOMDocument();
$source = loadUrlSource($url);
$dom->loadHTML($source);
$xpath = new DOMXPath($dom);
$domPage = new DOMDocument();
$domPage->loadHTML($source);
$xpath_page = new DOMXPath($domPage);
// Find page links with the title "go to page" within the div container that contains "pager" class.
$pageItems = $xpath_page->query("//div[contains(#class, 'pager')]//a[contains(#title, 'go to page')]");
// Get last page number.
// Since you will look once at the beginning for the page number, subtract by 2 because the link "next" has title "go to page" as well.
$pageCount = (int)$pageItems[$pageItems->length-2]->textContent;
// Loop every page
for($page=1; $page < $pageCount; $page++) {
$source = loadUrlSource($url . "?page={$page}");
// Do whatever with the source. You can also call simple_html_dom on the content.
// $dom = new simple_html_dom();
// $dom->load($source);
}