cache_dir != '') { $cache_file = $this->cache_dir.'/rsscache_'.md5($rss_url); $timedif = @ (time() - filemtime($cache_file)); if ($timedif < $this->cache_time) { // cached file is fresh enough, return cached array $result = unserialize(join('', file($cache_file))); // set 'cached' to 1 only if cached file is correct if ($result) $result['cached'] = 1; } else { // cached file is too old, create new $result = $this->Parse($rss_url); $serialized = serialize($result); if ($f = @ fopen($cache_file, 'w')) { fwrite($f, $serialized, strlen($serialized)); fclose($f); } if ($result) $result['cached'] = 0; } } // If CACHE DISABLED >> load and parse the file directly else { $result = $this->Parse($rss_url); if ($result) $result['cached'] = 0; } // return result return $result; } // ------------------------------------------------------------------- // Modification of preg_match(); return trimed field with index 1 // from 'classic' preg_match() array output // ------------------------------------------------------------------- function my_preg_match($pattern, $subject) { // start regullar expression preg_match($pattern, $subject, $out); // if there is some result... process it and return it if (isset ($out[1])) { // Process CDATA (if present) if ($this->CDATA == 'content') { // Get CDATA content (without CDATA tag) $out[1] = strtr($out[1], array (' '', ']]>' => '')); } elseif ($this->CDATA == 'strip') { // Strip CDATA $out[1] = strtr($out[1], array (' '', ']]>' => '')); } // If code page is set convert character encoding to required if ($this->cp != '') //$out[1] = $this->MyConvertEncoding($this->rsscp, $this->cp, $out[1]); $out[1] = iconv($this->rsscp, $this->cp.'//TRANSLIT', $out[1]); // Return result return trim($out[1]); } else { // if there is NO result, return empty string return ''; } } // ------------------------------------------------------------------- // Replace HTML entities &something; by real characters // ------------------------------------------------------------------- function unhtmlentities($string) { // Get HTML entities table $trans_tbl = get_html_translation_table(HTML_ENTITIES, ENT_QUOTES); // Flip keys<==>values $trans_tbl = array_flip($trans_tbl); // Add support for ' entity (missing in HTML_ENTITIES) $trans_tbl += array (''' => "'"); // Replace entities by values return strtr($string, $trans_tbl); } // ------------------------------------------------------------------- // Parse() is private method used by Get() to load and parse RSS file. // Don't use Parse() in your scripts - use Get($rss_file) instead. // ------------------------------------------------------------------- function Parse($rss_url) { // Open and load RSS file $urlParts = parse_url($rss_url); $host = $urlParts['host']; $uri = $urlParts['path']; if (strcmp($urlParts['query'], '') != 0) { $uri .= '?'.$urlParts['query']; } if (strcmp($urlParts['fragment'], '') != 0) { $fragment = $urlParts['fragment']; $fragment = substr($fragment, 4, strlen($fragment) - 3); $uri = $uri.$fragment; } if ($f = fsockopen($host, 80, $errno, $errstr, $this->connection_time)) { $rss_content = ''; fputs($f, "GET $uri HTTP/1.0\r\nHost: $host\r\n\r\n"); while (!feof($f)) { $rss_content .= fgets($f, 512); } fclose($f); // Parse document encoding $result['encoding'] = $this->my_preg_match("'encoding=[\'\"](.*?)[\'\"]'si", $rss_content); // if document codepage is specified, use it if ($result['encoding'] != '') { $this->rsscp = $result['encoding']; } // This is used in my_preg_match() // otherwise use the default codepage else { $this->rsscp = $this->default_cp; } // This is used in my_preg_match() // Parse CHANNEL info preg_match("'(.*?)'si", $rss_content, $out_channel); foreach($this->channeltags as $channeltag) { $temp = $this->my_preg_match("'<$channeltag.*?>(.*?)'si", $out_channel[1]); if ($temp != '') $result[$channeltag] = $temp; // Set only if not empty } // If date_format is specified and lastBuildDate is valid if ($this->date_format != '' && ($timestamp = strtotime($result['lastBuildDate'])) !== -1) { // convert lastBuildDate to specified date format $result['lastBuildDate'] = date($this->date_format, $timestamp); } // Parse TEXTINPUT info preg_match("']*[^/])>(.*?)'si", $rss_content, $out_textinfo); // This a little strange regexp means: // Look for tag with or without any attributes, but skip truncated version (it's not beggining tag) if (isset ($out_textinfo[2])) { foreach ($this->textinputtags as $textinputtag) { $temp = $this->my_preg_match("'<$textinputtag.*?>(.*?)'si", $out_textinfo[2]); if ($temp != '') $result['textinput_'.$textinputtag] = $temp; // Set only if not empty } } // Parse IMAGE info preg_match("']*>(.*?)'si", $rss_content, $out_imageinfo); if (isset ($out_imageinfo[1])) { foreach ($this->imagetags as $imagetag) { $temp = $this->my_preg_match("'<$imagetag.*?>(.*?)'si", $out_imageinfo[1]); if ($temp != '') $result['image_'.$imagetag] = $temp; // Set only if not empty } } // Parse ITEMS preg_match_all("'(.*?)'si", $rss_content, $items); $rss_items = $items[2]; $i = 0; $result['items'] = array (); // create array even if there are no items foreach ($rss_items as $rss_item) { // If number of items is lower then limit: Parse one item if ($i < $this->items_limit || $this->items_limit == 0) { foreach ($this->itemtags as $itemtag) { $temp = $this->my_preg_match("'<$itemtag.*?>(.*?)'si", $rss_item); if ($temp != '') $result['items'][$i][$itemtag] = $temp; // Set only if not empty } // Strip HTML tags and other bullshit from DESCRIPTION if ($this->stripHTML && $result['items'][$i]['description']) $result['items'][$i]['description'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['description']))); // Strip HTML tags and other bullshit from TITLE if ($this->stripHTML && $result['items'][$i]['title']) $result['items'][$i]['title'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['title']))); // If date_format is specified and pubDate is valid if ($this->date_format != '' && ($timestamp = strtotime($result['items'][$i]['pubDate'])) !== -1) { // convert pubDate to specified date format $result['items'][$i]['pubDate'] = date($this->date_format, $timestamp); } // Item counter $i ++; } } $result['items_count'] = $i; return $result; } else { return False; //die("Network error: $errstr ($errno)"); } } } ?> blog:ludens » Blog Archive » User-centered Innovation

Dec09

User-centered Innovation

~ studio:ludens @ December 9th, 2008

I found this amazingly interesting video from Eric von Hippel where he talks about user-centered innovation. For us, stimulating this type of innovation and giving more people access to tools with which they can innovate is an important goal.

What I noted in the examples von Hippel mentioned in his talk was the skill of users to modify a product or create a totally new one. What if users who do not have the tools now to build something will have them in the future. Could that mean that we can access a whole new field of knowledge that has never been used before?

hippel.jpg

From: Eric de Bruijn

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