Worpdress extra functions

px_helper.php

<?php
/**
 * PXHelper by Javier Otero
 * 
 * GNU General Public License, version 2
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 */

  	// ---------------------------------------------------
	// Get post by title
	// ---------------------------------------------------
	function px_get_post_by_title($page_title, $output = OBJECT) {
		global $wpdb;
		$post = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type='post'", $page_title ));
		if ( $post )
			return get_post($post, $output);
		return null;
	}

	// ---------------------------------------------------
	// Get page ID by Slug
	// ---------------------------------------------------  
	function px_get_pageID_by_slug($page_slug) {
		$page = get_page_by_path($page_slug);
		if ($page) {
			return $page->ID;
		} else {
			return null;
		}
	}

	// ---------------------------------------------------
	// Get permalink by Slug
	// ---------------------------------------------------  
	function px_get_page_permalink_by_slug($page_slug) {
		$page = get_page_by_path($page_slug);
		if ($page) {
			return get_permalink($page->ID);
		} else {
			return null;
		}
	}	

	// ---------------------------------------------------
	// Limit string words
	// ---------------------------------------------------
	function px_limit_words($string, $word_limit)
	{
		$words = explode(' ', $string, ($word_limit + 1));
		if(count($words) > $word_limit)
			array_pop($words);
		return implode(' ', $words);
	}
	
	// ---------------------------------------------------
	// Get ID for page using a specific template
	// ---------------------------------------------------
	function px_get_page_id_by_template( $template_file ){
		$pages = get_pages(array(
					'meta_key' => '_wp_page_template',
					'meta_value' => $template_file,
					'hierarchical' => 0
		));
		return $pages[0]->ID ;
	}
	
	// ---------------------------------------------------
	// Get link for page using a specific template
	// ---------------------------------------------------
	function px_get_page_by_template( $template_file ){
		$pages = get_pages(array(
			'meta_key' => '_wp_page_template',
			'meta_value' => $template_file,
			'hierarchical' => 0
		));
		return get_permalink($pages[0]->ID) ;
	}
	
	// ---------------------------------------------------
	// Check for subpages
	// ---------------------------------------------------	
	function px_is_subpage( $template_file ) {
		global $post; 
		$pages = get_pages(array(
			'meta_key' => '_wp_page_template',
			'meta_value' => $template_file
		));

		if ( is_page() && $post->post_parent == $pages[0]->ID ) {   	// test to see if the page has a parent
			return true;			             		// return the ID of the parent post
		} else { 			                                // there is no parent so ...
			return false;           		                // ... the answer to the question is false
		}
	}

	// ---------------------------------------------------
	// Get Gravatar url
	// ---------------------------------------------------
	function px_get_gravatar_url( $email, $size ) {
		$hash = md5( strtolower( trim ( $email ) ) );
		return 'http://gravatar.com/avatar/' . $hash . '?s=' . $size . '&d=404';
	}
	
	// ---------------------------------------------------
	// Get first image from post
	// ---------------------------------------------------	
	function px_get_first_image() {
		global $post, $posts;
		$first_img = '';
		ob_start();
		ob_end_clean();
		$output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
		$first_img = $matches[1][0];

		if(empty($first_img)) {
			$first_img = "/path/to/default.png";
		}
		return $first_img;
	}	
	
	// ---------------------------------------------------
	// Generates the breadcrumb
	// ---------------------------------------------------	
	function px_get_breadcrumb() {

		global $post;

		$trail = '&nbsp;&nbsp;»&nbsp;&nbsp;';
		$page_title = get_the_title($post->ID);

		if($post->post_parent) {
			$parent_id = $post->post_parent;

			while ($parent_id) {
				$page = get_page($parent_id);
				$breadcrumbs[] = '<a href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a> » ';
				$parent_id = $page->post_parent;
			}

			$breadcrumbs = array_reverse($breadcrumbs);
			foreach($breadcrumbs as $crumb) $trail .= $crumb;
		}

		$trail .= '<span>'. $page_title . '</span>';
		$trail .= '	';

		return $trail;	

	}

	// ---------------------------------------------------
	// Returns the english ordinal for a number
	// ---------------------------------------------------	
	function px_ordinal( $number ) {

		$ends = array('th','st','nd','rd','th','th','th','th','th','th');
		if (($number %100) >= 11 && ($number%100) <= 13)
			$abbreviation = $number. 'th';
		else
			$abbreviation = $number. $ends[$number % 10];

		return $abbreviation;
	}

	// ---------------------------------------------------
	// twitter feeds
	// ---------------------------------------------------
	function px_twitter_feed( $twitter_user, $limit){
		
		$tweet = json_decode(file_get_contents("http://api.twitter.com/1/statuses/user_timeline/" . $twitter_user . ".json?count=".$limit));
		echo '<ul class="tweet">';
		for ($i=1; $i <= $limit; $i++){   
			echo '<li><p>'.$tweet[($i-1)]->text.'</p>';
			echo '<a href="http://www.twitter.com/' . $twitter_user . '" target="_parent">';
			echo '<span class="time">Posted by ' . $twitter_user. ', '. date("M d",strtotime($tweet[($i-1)]->created_at)).'</span>';
			echo '</a>';
			echo '</li>';  
		}
		echo '<ul>';    
		echo '<a href="http://www.twitter.com/' . $twitter_user . '" class="sprites-blue small-arrow-box linkbutton" target="_blank"><span>@'.$twitter_user.'</span></a>';
							
	}
	
	// ---------------------------------------------------
	// flickr feeds
	// ---------------------------------------------------
	function px_flickr_feed( $flickr_id, $limit){
	    if( '' != $flickr_id ){
			$flickr_json = file_get_contents("http://api.flickr.com/services/feeds/photos_public.gne?id=". $flickr_id ."&format=json&nojsoncallback=1");
		} else {
			$flickr_json = file_get_contents("http://api.flickr.com/services/feeds/photos_public.gne?id=38386919@N07&format=json&nojsoncallback=1");	
		}
		if ($flickr_json === false) {
			echo '<p>Flickr API error.Try later.</p>';
		} else {
			$flickr = json_decode($flickr_json);
			$flickr_url = $flickr->link;
			echo '<ul>';
			for ($i=1; $i <= $limit; $i++){
			    	$img = $flickr->items[($i-1)]->media->m;
				$img_s = str_replace('_m.jpg','_s.jpg',$img);
				$img_b = str_replace('_m.jpg','_b.jpg',$img);
			    	$img_title = $flickr->items[($i-1)]->title;
				echo '<li><a class="fancybox" href="' . $img_b . '" title="'.$img_title.'"><img src="' . $img_s . '" alt="'.$img_title.'" width="37" height="37" /></a></li>';
			}
			echo '</ul>';    
		}

		echo '<a href="'.$flickr_url.'" class="sprites-blue small-arrow-box linkbutton"><span>our photo stream</span></a>';
							
	}

?>