Auto embed latest tweet from post author (based on Twitter ID field in author profile)

content-author-tweet.php

<?php
  $curauth = get_userdata($post->post_author); //get data for current post author
	$twitter_id = $curauth->twitter;
	$api = array(
		'consumer_key'			=>	'nbRYD9VZGOk8VDiqvuVg',
		'consumer_secret'		=>	'MMtHXv9ErHjLEOcNJLjNWfC3WRVy1Qe3qHE4vl4Uo',
		'oauth_access_token' 		=>	'1330201-jMrtoilTOGUCneecIV5yGYD6mUh8tmxbf5OWEUM',
		'oauth_access_token_secret' 	=>	'wzW875Vsj2xlGQivqvW1h35Zq7GkT6VqLVtBn0gJqY',
	);
	$tweets = ktp_get_tweets( $twitter_id, 1, $api );
	 foreach( $tweets as $chirp ) {
		$tweet = preg_replace("/((http)+(s)?:\/\/[^<>\s]+)/i", "<a href=\"\\0\" target=\"_blank\">\\0</a>", $chirp->text );
		$tweet = preg_replace("/[@]+([A-Za-z0-9-_]+)/", "<a href=\"http://twitter.com/\\1\" target=\"_blank\">\\0</a>", $tweet );
		$tweet = preg_replace("/[#]+([A-Za-z0-9-_]+)/", "<a href=\"http://twitter.com/search?q=%23\\1\" target=\"_blank\">\\0</a>", $tweet );

		echo '<blockquote width="600" align="center" class="twitter-tweet"><a href="https://twitter.com/' .$twitter_id. '/status/' .$chirp->id_str. '</blockquote>';
		echo '<script src="//platform.twitter.com/widgets.js" charset="utf-8"></script>';
	}

function ktp_get_tweets( $user = 'twitter', $count = 1, $api ) {
	// Set the URL and our tokens/keys
	$url	= "https://api.twitter.com/1.1/statuses/user_timeline.json";
	//Change me below, to your own tokens
	$consumer_key			= $api['consumer_key'];
	$consumer_secret		= $api['consumer_secret'];
	$oauth_access_token		= $api['oauth_access_token'];
	$oauth_access_token_secret	= $api['oauth_access_token_secret'];

	// Set our variables
	$oauth = array(
		'screen_name'             => $user,
		'count'                   => $count,
		'oauth_consumer_key'      => $consumer_key,
		'oauth_nonce'             => time(),
		'oauth_signature_method'  => 'HMAC-SHA1',
		'oauth_token'             => $oauth_access_token,
		'oauth_timestamp'         => time(),
		'oauth_version'           => '1.0'
	);

	// Put everything together
	$base_info = ktp_tweet_build_base( $url, 'GET', $oauth );
	$composite_key = rawurlencode( $consumer_secret ) . '&' . rawurlencode( $oauth_access_token_secret );
	$oauth['oauth_signature'] = base64_encode( hash_hmac('sha1', $base_info, $composite_key, true ) );

	// Make Requests
	$options = array(
		CURLOPT_HTTPHEADER      => array( ktp_tweet_authorize_header( $oauth ), 'Expect:' ),
		CURLOPT_HEADER          => false,
		CURLOPT_URL             => $url . '?screen_name=' . $user . '&count=' . $count,
		CURLOPT_RETURNTRANSFER  => true,
		CURLOPT_SSL_VERIFYPEER  => false
	);

	// Build our feed
	$feed = curl_init();
	curl_setopt_array( $feed, $options );
	$json = curl_exec( $feed );
	curl_close( $feed );
	$tweets = json_decode( $json );
	return $tweets;
}

function ktp_tweet_build_base( $baseURI, $method, $params ) {
	$r = array();
	ksort( $params );
	foreach( $params as $key=>$value ){
		$r[] = "$key=" . rawurlencode( $value );
	}
	return $method."&" . rawurlencode( $baseURI ) . '&' . rawurlencode( implode( '&', $r ) );
}

function ktp_tweet_authorize_header( $oauth ) {
	$r = 'Authorization: OAuth ';
	$values = array();
	foreach( $oauth as $key=>$value )
		$values[] = "$key=\"" . rawurlencode( $value ) . "\"";
		$r .= implode( ', ', $values );
		return $r;
}
?>