<?php

// $page_url = Page URL

function page_source($page_url)
{
        $curl = curl_init();
        curl_setopt($curl,CURLOPT_URL,$page_url);
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
        $data = curl_exec($curl);
        curl_close($curl);
        return $data;
}

echo page_source('http://yahoo.com');

?>