May 30 2010

Parsing Flickr Feed with PHP tutorial

Category: Php,Spiders & web botsGiulio Pons @ 10:48 pm

I’ve spent about 30 minutes to find a javascript embed to print out a custom thumbs list of flickr photos, but I didn’t find anything clean enaugh… and I’ve not enaugh time to spend to read the flickr’s API’s…
So, I’ve searched for the feed of the user, and I’ve found it at the bottom of flickr’s pages: I’ve decided to grab the feed and parse it to get my custom gallery.
If you’re looking for the flickr’s feed it’s here, at the bottom:

flickr feed

If you click on the feed link you will open the feed (this can be shown in different ways depending on your browser). If you look the URL of the feed you’ve clicked, you can see that it contains the “id” of the feed on flickr database, here is the id:

feed id

Take the id. And then use this php function to grab and create the thumbs list, this code will simply output anchors and images, so you have to use css to customize it as you want:

function attr($s,$attrname) { // return html attribute
	preg_match_all('#\s*('.$attrname.')\s*=\s*["|\']([^"\']*)["|\']\s*#i', $s, $x);
	if (count($x)>=3) return $x[2][0]; else return "";
}

// id = id of the feed
// n = number of thumbs
function parseFlickrFeed($id,$n) {
	$url = "http://api.flickr.com/services/feeds/photos_public.gne?id={$id}&lang=it-it&format=rss_200";
	$s = file_get_contents($url);
	preg_match_all('#<item>(.*)</item>#Us', $s, $items);
	$out = "";
	for($i=0;$i<count($items[1]);$i++) {
		if($i>=$n) return $out;
		$item = $items[1][$i];
		preg_match_all('#<link>(.*)</link>#Us', $item, $temp);
		$link = $temp[1][0];
		preg_match_all('#<title>(.*)</title>#Us', $item, $temp);
		$title = $temp[1][0];
		preg_match_all('#<media:thumbnail([^>]*)>#Us', $item, $temp);
		$thumb = attr($temp[0][0],"url");
		$out.="<a href='$link' target='_blank' title=\"".str_replace('"','',$title)."\"><img src='$thumb'/></a>";
	}
	return $out;
}

// usage example:
echo parseFlickrFeed("16664181@N00",9);
// you have to use css to customize it

Like here:
flickr thumbs css

This code will be addedd to the next version of Mini Bots Class.

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Nov 09 2009

Make square thumbs or cropped thumbs with php

Category: PhpGiulio Pons @ 5:57 pm

This is a thumb generator php class.

I’ve been searching a lot for some code to make good thumbs on the fly, sometimes squared, sometimes cropped with a rectangular shape (not square). I’ve made also my own code that I’ve made for www.rockit.it to handle also some caching work, but this class is better than mine and works fine. So, here it is the link:

http://phpthumb.sourceforge.net/

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