function __construct($imgtag = '', $referer = '')
{
if (!$imgtag) {
return;
}
$this->tag = $imgtag;
// poster captures also HTML5 video thumbnails
if (!preg_match('/(?:src|poster) *=["\'](.+?)["\']/i', $this->tag, $matches) && !preg_match('/(?:src|poster) *=([^ ]+)/i', $this->tag, $matches)) {
// Some sites don't use quotes
if (!preg_match('/["\']((http:){0,1}[\\.\\d\\w\\-\\/]+\\.jpg)["\']/i', $this->tag, $matches)) {
return;
}
} else {
// Avoid maps, headers and such
if (preg_match('/usemap=|header/i', $this->tag)) {
return;
}
}
parent::__construct($matches[1], $referer);
$this->type = 'local';
if (strlen($this->url) < 5 || WebThumb::$visited[$this->url]) {
return;
}
WebThumb::$visited[$this->url] = true;
// Avoid images generated by scripts with different IDs per page
if ((!$this->referer || $this->parsed_referer['host'] != $this->parsed_url['host']) && !preg_match('/\\.jpg/', $this->url) && preg_match('#/.+?\\?.+?&.+?&.+#', $this->url)) {
return;
}
if (preg_match('/[ "]width *[=:][ \'"]*(\\d+)/i', $this->tag, $match)) {
$this->html_x = $this->x = intval($match[1]);
$this->weight *= 1.5;
// Give preference to images with img attributes
}
if (preg_match('/[ "]height *[=:][ \'"]*(\\d+)/i', $this->tag, $match)) {
$this->html_y = $this->y = intval($match[1]);
$this->weight *= 1.5;
// Give preference to images with img attributes
}
// First filter to avoid downloading very small images
if ($this->x > 0 && $this->x < 100 || $this->y > 0 && $this->y < 100) {
return;
}
if (!preg_match('/loading|button|banner|\\Wads\\W|\\Wpub\\W|\\/ad\\/|\\/logo[\\/\\.]|header|rss|advertising/i', $this->url)) {
$this->candidate = true;
}
}
