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<?php $total_seconds = 0; $dom = new DOMDocument(); $dom->loadXML(file_get_contents('https://www.googleapis.com/youtube/v3/playlistItems?part=id&maxResults=0&playlistId=PLsDlOcV-nPMxzr8X99EcHuQWnf81DCXKc&key=AIzaSyCA3cc5Gci2lI8dTW7wiEH_X8Pvcm-w6jo')); $xpath = new DOMXPath($dom); foreach ($xpath->query('//yt:duration/@seconds') as $duration) { $total_seconds += (int) $duration->value; } echo (int) ($total_seconds / 3600) . ':' . (int) ($total_seconds / 60) % 60 . ':' . $total_seconds % 60;

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