Created
April 6, 2011 13:41
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Archive tweets from a weekly Twitter chat. In this case, chat hashtag is #pubmedia (Mon 8p ET). Uses Twitter Search API and WordPress function: wp_remote_get().
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<?php | |
/* | |
Twitter Chat Archive: | |
Get hashtag results from Twitter Search API (in JSON) for a weekly chat. | |
API takes date range via values: 'since' thru 'until' (YYYY-MM-DD). | |
API limits: 1 page per request, 100 results per page, 1500 total results: <7 days old. | |
Script below: Repeats page requests until no results found w/in date-range. | |
Then gathers only those results w/in specified timestamp range. | |
Then sort results from oldest to newest. | |
Then prints in HTML. API query script (using: wp_remote_get) from: | |
http://wordpress.org/extend/plugins/twitter-hash-tag-widget/ | |
*/ | |
// Set timezone for all time calculations. | |
date_default_timezone_set( 'America/New_York' ); | |
// Variables for time-range of tweet-results to retrieve. | |
$day_start = 'Monday'; | |
$hr = '20'; | |
$min = '0'; | |
$sec = '0'; | |
$duration = '150'; // Length in minutes btwn start and end of time-range. | |
// Set date-range for Twitter API query values: 'since' and 'until'. | |
// (If $day_start='Monday', use 'last Monday', unless 'today' is Mon). | |
$date_since = ( date( 'l' ) != $day_start ) ? strtotime( 'last ' . $day_start ) : strtotime( 'today' ); | |
$date_until = $date_since + 86400; // // Sets 'until' date to 1 day (86.4K sec) after 'since'. | |
// Timestamps for range, start and end, of results. | |
$time_start = $date_since + ($hr * 3600) + ($min * 60) + $sec; | |
$time_end = $time_start + ($duration * 60); | |
//Variables for Twitter API query. | |
$api_url = 'http://search.twitter.com/search.json'; | |
$hashtag = 'pubmedia'; | |
$rpp = 100; | |
$page = 1; | |
$since = date( 'Y-m-d', $date_since ); // API needs YYYY-MM-DD. | |
$until = date( 'Y-m-d', $date_until ); | |
$arr_all = array(); // To hold results w/in timestamp-range. | |
//Text of info about Chat, for HTML. | |
$chat_text = 'Twitter Chat (8-10pm ET):'; | |
do { // Always get first results page; then get successive pages until no results. | |
$api_query = wp_remote_get( "$api_url?q=%23$hashtag&rpp=$rpp&page=$page&since=$since&until=$until" ); | |
if ( is_wp_error( $api_query ) ) { | |
$html = "<p>Failed to update from Twitter!</p>\n"; | |
$html .= "<!-- {$api_query->errors['http_request_failed'][0]} -->\n"; | |
} else { // Hold this API page of JSON results in an array ($arr). | |
$arr = get_object_vars( json_decode( $api_query['body'] ) ); | |
for ( $i=0; $i < count( $arr['results'] ); $i++ ) { | |
$arr['results'][$i] = get_object_vars( $arr['results'][$i] ); | |
// Hold results from all pages in an array ($arr_all), | |
// but only if result's timestamp is w/in specified timestamp-range. | |
$time_tweet = strtotime( $arr['results'][$i]['created_at'] ); | |
if ( $time_tweet >= $time_start && $time_tweet <= $time_end ) // | |
$arr_all[] = $arr['results'][$i]; | |
} | |
} | |
$page++; // For next page of API results. | |
} while ( $arr['results'] ); | |
// Sort oldest to newest | |
$arr_asc = array_reverse ( $arr_all ); | |
$arr_count = count($arr_asc); // Number of tweets w/in time range. | |
// HTML info about Chat that precedes results, w/ total tweets; open div for results: | |
$html = "<p><em><a href='http://search.twitter.com/search?q=%23$hashtag' title='Twitter hashtag'>#$hashtag</a> $chat_text $since ($arr_count tweets)</em></p><!--more-->\n<div id='tweets'>\n"; | |
// HTML for each result: | |
foreach ( $arr_asc as $result ) { | |
$profile_image_url = $result['profile_image_url']; | |
$created_at = $result['created_at']; | |
$user = $result['from_user']; | |
$id = $result['id']; | |
$text = $result['text']; | |
$tweettime = date( 'Md h:i:sa', strtotime( $created_at ) ); // Timestamp. | |
// Make clickable: URLs, twitter users (@), and hashtags (#). | |
$text = preg_replace('|(https?://[^\ ]+)|', '<a href="$1">$1</a>', $text); | |
$text = preg_replace('|@(\w+)|', '<a href="http://twitter.com/$1">@$1</a>', $text); | |
$text = preg_replace('|#(\w+)|', '<a href="http://search.twitter.com/search?q=%23$1">#$1</a>', $text); | |
$html .= "<div class='tweetchat'>"; | |
if ( $profile_image_url ) // Add user image, if it exists. | |
$html .= "<img class='alignright' src='$profile_image_url' alt='Twitter user: $user' />"; | |
// Add user's link, then tweet's text and time. | |
$html .= "<a href='http://twitter.com/$user' rel='nofollow' title='Twitter user: $user'>$user</a>: $text <span class='tweettime'>$tweettime</span></div><!-- .tweetchat -->\n"; | |
} | |
$html .= "</div><!-- #tweets -->\n"; // Close div for all results. | |
// HTML that follows all results: | |
$html .= '<p><em>Every Monday 8-10pm Eastern: <a href="http://search.twitter.com/search?q=pubmedia" title="twitter hashtag">#pubmedia</a> twitter chat.</p>'; | |
// Print the HMTL of all results w/in time-range. | |
echo $html; | |
?> |
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