How do I retrieve data from an external url using php? - php

Question

This is the current code that I have in order to retrieve the sizes for a particular product, however when an item has multiple drop-downs such as this one does for color. You must first select the color before retrieving the sizes for that color. I will need to retrieve both sets of data; colors and sizes.
It seems if I am not mistaken that this site uses the JSON structure.
I am a VERY novice learner and would like guidance on what to do next in order to retrieve the data using php...
Thanks in advance! :)
<?php
$doc = new DOMDocument();
#$doc ->loadHTMLFile('http://www.drjays.com/shop/P1543932/');
$xpath = new DOMXPath($doc);
$size = $xpath->query('//*[contains(#class, \'product_dropdown\')]');
foreach ($size as $sizes)
{
echo $sizes->nodeValue .PHP_EOL;
}
?>
update: I was able to use Google Chrome (developer tools) to retrieve this information. I believe this is confirmation that it is in fact JSON.
"description" : "The Lace Inset Tie Front Woven Top by Apple Bottoms features:\r\n<br>\r\n<ul>\r\n<li> US sizing</li>\r\n<li> Pieced lace accents on shoulders</li>\r\n<li> Metal stud trim</li>\r\n<li> Two chest pockets</li>\r\n<li> Button-down closure</li>\r\n<li> Sleeveless cut</li>\r\n<li> Waist tie on front</li>\r\n\r\n<br>\r\n<b> Model is wearing size 1X</b>\r\n</ul>",
"sizes" : [
{
"id" : "1533783",
"display" : "1X"
},
{
"id" : "
1533785",
"display" : "2X"
}
]

Answer 1

i don't think that is the url for the actual JSON object, with the google chrome developer tools can you find the object url?