Is it possible to make a web page that will go search jobs sites and display the results on my webpage ? Would the Jobsite have to have an API in order for me to do this ?
If you are using an API you'll need to read the API documentation. If you are going to scrape the site basically you just need to download the page (ie file_get_contents('some url'); ) and then parse out the data you want. Look into the DOM class for parsing.