Dynamic Urls

$images='https://www.istockphoto.com/photos/keyword?mediatype=photography&phrase=keyword&sort=mostpopular'
$video='https://www.youtube.com/results?search_query=keyword'
$newsfeed='http://keywordbuttons.net/_script/_content/data.newsfeed.url.template.txt'
$shopping='http://keywordbuttons.net/_script/_content/data.shopping.url.template.txt'
$dictionary='http://keywordbuttons.net/_script/_content/data.extract.dictionary.php?user=user&keyword=keyword&topic=topic'
$wordcloud='http://keywordbuttons.net/_script/_content/data.initial.wordcloud.php?user=user&topic=topic&keyword=keyword&rty...
$gtrends='http://keywordbuttons.net/_gtrends/index.php?user=user&redvar=keyword&type=keywords'
$articles='https://html.duckduckgo.com/html/?q=pdf+keyword'