PHP Foreach 多个数组

单个数组

foreach ( $imgurls as $imgurl ){
    echo $imgurl;
        }

两个数组

foreach ( array_combine($imgurls, $attach_ids) as $imgurl => $attachid ){
    echo $imgurl;
    echo $attachid;
        }

三个及以上数组

foreach ( array_map(NULL, $imgurls, $attach_ids, $img_medium_urls) as $x ){
    list($imgurl, $attach_id, $img_medium_url) = $x;
    echo $imgurl;
    echo $attach_id;
    echo $img_medium_url;
        }