Cant seem to scrape with website with PHP Simple HTML DOM Parser - php

Question

I am new to scraping website and I was interested in getting the ticket prices from this website.
https://www.cheaptickets.com/events/tickets/firefly-music-festival-4-day-pass-2867495
I see the ticket prices in the p#price-selected-label.filters-selected-label tag, but I cant seem to access it. I tried a few things and looked at a few tutorials, but either I get a blank returned or some error. The code is based off http://blog.endpoint.com/2016/07/scrape-web-content-with-php-no-api-no.html
<?php
require('simple_html_dom.php');
// Create DOM from URL or file
$html = file_get_html('https://www.cheaptickets.com/events/tickets/firefly-music-festival-4-day-pass-2867495');
// creating an array of elements
$videos = [];
// Find top ten videos
$i = 1;
$videoDetails = $html->find('p#price-selected-label.filters-selected-label')-> innertext;
// $videoDetails = $html->find('p#price-selected-label.filters-selected-label',0);
echo $videoDetails;
/*
foreach ($html->find('li.expanded-shelf-content-item-wrapper') as $video) {
if ($i > 10) {
break;
}
// Find item link element
$videoDetails = $video->find('a.yt-uix-tile-link', 0);
// get title attribute
$videoTitle = $videoDetails->title;
// get href attribute
$videoUrl = 'https://youtube.com' . $videoDetails->href;
// push to a list of videos
$videos[] = [
'title' => $videoTitle,
'url' => $videoUrl
];
$i++;
}
var_dump($videos);
*/

Answer 1

You can't get it because javascript renders it, so it's not available in the original html that your library get.
Use phantomjs(will execute javascript);
Download phantomjs and place the executable in a path that your PHP binary can reach.
Place the following 2 files in the same directory:
get-website.php
<?php
$phantom_script= dirname(__FILE__). '/get-website.js';
$response = exec ('phantomjs ' . $phantom_script);
echo htmlspecialchars($response);
?>
get-website.js
var webPage = require('webpage');
var page = webPage.create();
page.open('https://www.cheaptickets.com/events/tickets/firefly-music-festival-4-day-pass-2867495', function(status) {
if (status === "success") {
page.includeJs('http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js', function() {
var myElem = $('p#price-selected-label.filters-selected-label');
console.log(myElem);
});
phantom.exit();
}
});
Browse to get-website.php and the target site, https://www.cheaptickets.com/events/tickets/firefly-music-festival-4-day-pass-2867495 contents will return after executing inline javascript. You can also call this from a command line using php /path/to/get-website.php.