rss-bridge/bridges/InstagramBridge.php

<?php
class InstagramBridge extends BridgeAbstract {

	const MAINTAINER = 'pauder';
	const NAME = 'Instagram Bridge';
	const URI = 'https://instagram.com/';
	const DESCRIPTION = 'Returns the newest images';

	const PARAMETERS = array( array(
		'u' => array(
			'name' => 'username',
			'required' => true
		)
	));

	public function collectData(){
		$html = getSimpleHTMLDOM($this->getURI())
			or returnServerError('Could not request Instagram.');

		$innertext = null;

		foreach($html->find('script') as $script){
			if('' === $script->innertext){
				continue;
			}

			$pos = strpos(trim($script->innertext), 'window._sharedData');
			if(0 !== $pos){
				continue;
			}

			$innertext = $script->innertext;
			break;
		}

		$json = trim(substr($innertext, $pos + 18), ' =;');
		$data = json_decode($json);

		$userMedia = $data->entry_data->ProfilePage[0]->user->media->nodes;

		foreach($userMedia as $media){
			$item = array();
			$item['uri'] = self::URI . 'p/' . $media->code . '/';
			$item['content'] = '<img src="' . htmlentities($media->display_src) . '" />';
			if (isset($media->caption)){
				$item['title'] = $media->caption;
			} else {
				$item['title'] = basename($media->display_src);
			}
			$item['timestamp'] = $media->date;
			$this->items[] = $item;
		}
	}

	public function getName(){
		if(!is_null($this->getInput('u'))){
			return $this->getInput('u') . ' - Instagram Bridge';
		}

		return parent::getName();
	}

	public function getURI(){
		if(!is_null($this->getInput('u'))){
			return self::URI . urlencode($this->getInput('u'));
		}

		return parent::getURI();
	}
}