twitterOauth(1.1) ライブラリ無しでユーザのタイムラインを取得するまでのコード ref: http://qiita.com/59naga/items/76b5f34450442bbc615c

file0.php

<?# cgi-fcgi 5.4.17
session_start();
$consumer_key='割愛';
$consumer_secret='同上';

$cnstv=array(
  'oauth_consumer_key'=>$consumer_key,
  'oauth_nonce'=>md5(time()),
  'oauth_signature_method'=>'HMAC-SHA1',
  'oauth_timestamp'=>(string)time(),
);
if(empty($_SESSION)){
  $url='https://api.twitter.com/oauth/request_token';
  $signature_base='GET&'.rawurlencode($url).'&'.rawurlencode(http_build_query($cnstv));
  $signature_key=implode('&',array($consumer_secret,""));
  $signature=hash_hmac('sha1',$signature_base,$signature_key,true);
  $cnstv['oauth_signature']=base64_encode($signature);

  $request=array();
  $request_url=$url.'?'.http_build_query($cnstv);
  $result=file_get_contents($request_url);
  parse_str($result,$request);

  $_SESSION['oauth_token']=$request['oauth_token'];
  $_SESSION['oauth_secret']=$request['oauth_secret'];
  $auth_url='https://api.twitter.com/oauth/authenticate?oauth_token='.$request['oauth_token'];
  header('Location: '.$auth_url);
}
else if(isset($_GET['oauth_verifier'])){
  $url='https://api.twitter.com/oauth/access_token';
  $cnstv['oauth_token']=$_SESSION['oauth_token'];
  $cnstv['oauth_verifier']=$_GET['oauth_verifier'];
  $signature_base='GET&'.rawurlencode($url).'&'.rawurlencode(http_build_query($cnstv));
  $signature_key=implode('&',array($consumer_secret,$_SESSION['oauth_secret']));
  $signature=hash_hmac('sha1',$signature_base,$signature_key,true);
  $cnstv['oauth_signature']=base64_encode($signature);

  $access=array();
  $access_url=$url.'?'.http_build_query($cnstv);
  $result=file_get_contents($access_url);
  parse_str($result,$access);

  $_SESSION=$access;
  if(empty($_SESSION['oauth_token_secret'])){
    header("Content-Type: text/plain");
    echo "Failure authorize";
  }
}
if(isset($_SESSION['oauth_token_secret'])){
  $url='https://api.twitter.com/1.1/statuses/home_timeline.json';
  $cnstv['oauth_token']=$_SESSION['oauth_token'];
  $signature_base='GET&'.rawurlencode($url).'&'.rawurlencode(http_build_query($cnstv));
  $signature_key=implode('&',array($consumer_secret,$_SESSION['oauth_token_secret']));
  $signature=hash_hmac('sha1',$signature_base,$signature_key,true);
  $cnstv['oauth_signature']=base64_encode($signature);

  $status=array();
  $status_url=$url.'?'.http_build_query($cnstv);
  $result=file_get_contents($status_url);

  header("Content-Type:text/plain;charset=utf8");
  echo "Hello, ",$_SESSION['screen_name']."\n";
  $timeline=json_decode($result);
  for($i=0,$length=count($timeline);$i<$length;++$i){
    $tweet=$timeline[$i];
    echo $tweet->user->screen_name,' ',$tweet->text,"\n";
  }
}