<?php
$siteler[] = 'https:// sitesmi.com/konu-basligi-1';
$siteler[] = 'https:// sitesmi.com/konu-basligi-2';
$siteler[] = 'https:// sitesmi.com/konu-basligi-3';


foreach($siteler as $s) {
    $url = file_get_contents($s);

    preg_match_all('@<p><a rel="nofollow" target="_blank" href="(.*?)" class="external">video</a></p>@si',$url,$link);

    $cikti = implode("<br>", $link[1]);

    echo $cikti;
}
?>