Format Tweet PHP

format_tweet.php

<?php

function format_tweet($tweet_obj){
	//create an array of tweet entities
	$entity_arr = array();
	$formatted_text = $tweet_obj['text'];
	foreach($tweet_obj['entities'] as $entity){
		foreach($entity as $item){
			$entity_arr[] = $item;
		}
	}

	//sort entity indices from largest to smallest
	//this allows you to modify the original text without worrying about indices changing
	usort($entity_arr, 'indices_sort');

	//format it!
	for($i = 0; $i < count($entity_arr); $i++){
		$target_text = substr($formatted_text, $entity_arr[$i]['indices'][0], $entity_arr[$i]['indices'][1] - $entity_arr[$i]['indices'][0]);
		if($entity_arr[$i]['screen_name']){
			$formatted_text = str_replace($target_text, '<a href="http://twitter.com/'. $entity_arr[$i]['screen_name'] .'" target="_blank">'. $target_text .'</a>', $formatted_text);
		} else if ($entity_arr[$i]['url']) {
			$formatted_text = str_replace($target_text, '<a href="'. $target_text .'" target="_blank">'. $target_text .'</a>', $formatted_text);
		} else {
			$formatted_text = str_replace($target_text, '<a href="http://twitter.com/hashtag/'. $entity_arr[$i]['text'] .'" target="_blank">'. $target_text .'</a>', $formatted_text);
		}
	}

	return $formatted_text;
}

//sorting function used for sorting tweets
function indices_sort($a, $b){
	if(intval($b['indices'][0]) == intval($a['indices'][0])){
		return 0;
	}
	return (intval($b['indices'][0]) < intval($a['indices'][0])) ? -1 : 1;
}

function format_time($time_to_format){
	$current_time = time();
	$time_to_format = strtotime($time_to_format);
	$time_ago = $current_time - $time_to_format;
	$formatted_time = '';

	if($time_ago < 60){
		$formatted_time = $time_ago . ' seconds ago';
	} else if($time_ago < 3600){
		$formatted_time = floor($time_ago/60) . (floor($time_ago/60) == 1 ? ' minute ago' : ' minutes ago');
	} else if($time_ago < 86400) {
		$formatted_time = floor($time_ago/3600) . (floor($time_ago/3600) == 1 ? ' hour ago' : ' hours ago');
	} else if($time_ago > 86400){
		$formatted_time = floor($time_ago/86400) . (floor($time_ago/86400) == 1 ? ' day ago' : ' days ago');
	}

	return $formatted_time;

}

?>