PHP Php功能可调整YouTube和Vimeo的视频大小

Posted 2021-05-14

function resizeEmbed($video,$new_width='') {
	$video = real_strip_tags($video,array('iframe','embed','param','object'),true);
	preg_match("/width=\"([^\"]*)\"/i",$video,$w); $w = (integer)$w[1];
	preg_match("/height=\"([^\"]*)\"/i",$video,$h); $h = (integer)$h[1];
        if (!$new_width) $new_width = $w;
	$w2 = $new_width;
	$ratio = (float)($w2/$w);
	$h2 = (integer)($h * $ratio);
	$video = str_replace("width=\"$w\"","width=\"$w2\"",$video);
	$video = str_replace("height=\"$h\"","height=\"$h2\"",$video);
	return array("embed"=>$video,"w"=>$w2,"h"=>$h2,"w0"=>$w,"h0"=>$h);
}

function real_strip_tags($i_html, $i_allowedtags = array(), $i_trimtext = FALSE) {
	if (!is_array($i_allowedtags)) $i_allowedtags = !empty($i_allowedtags) ? array($i_allowedtags) : array();
	$tags = implode('|', $i_allowedtags);
	if (empty($tags)) $tags = '[a-z]+';
	preg_match_all('@</?\s*(' . $tags . ')(\s+[a-z_]+=(\'[^\']+\'|"[^"]+"))*\s*/?>@i', $i_html, $matches);
	$full_tags = $matches[0];
	$tag_names = $matches[1];
	foreach ($full_tags as $i => $full_tag) {
		if (!in_array($tag_names[$i], $i_allowedtags)) if ($i_trimtext) unset($full_tags[$i]); else $i_html = str_replace($full_tag, '', $i_html);
	}
	return $i_trimtext ? implode('', $full_tags) : $i_html;
}