$search = '/src="(.*?(page=1))/';
 preg_match_all($search, $content , $r);


<div style="position: relative; padding: 30% 45%;">
			<iframe style="position: absolute; width: 100%; height: 100%; left: 0; top: 0;" src="<?php echo $r[1][0];?>&as_wide=1&high_quality=1&danmaku=0" frameborder="no" scrolling="no" sandbox="allow-top-navigation allow-same-origin allow-forms allow-scripts"></iframe>
</div>