gistfile1.aw

<?php
    class Message {
        private $text;
        private $timestamp;
        private $formatter;

        public function __construct( $text, $timestamp, $formatter ) {
            $this->text = $text;
            $this->timestamp = $timestamp;
        }

        public function __toString() {
            $msg = $this->formatter->format( $this->text, $this->timestamp );
            return $msg;
        }
    }
    
    class MessageFormatter {
        private $format;

        public function __construct( $fmt ) {
              $this->format = $fmt;
        }

        public function format() {
            return vsprintf($this->fmt, func_get_args() );
        }
    }

    if ( !isset( $argv[ 1 ] ) ) {
        die();
    }

    $username = $argv[ 1 ];
    $tweets = json_decode(
        file_get_contents( 'https://api.twitter.com/1/statuses/user_timeline.json?screen_name=' . $username )
    );

    $fp = fopen( $username . '.txt', 'w' );
    foreach ( $tweets as $tweet ) {
        $msg = new Message( $tweet->text, $tweet->created_at );
        fwrite( $fp, $msg . "\n" );
    }
    fclose( $fp );
?>