$re = '/https?:\/\/[^/]*(\/wp-content\/uploads\/\d{4}\/\d{2}\/)([^\/\s]+)/m';
$str = 'https://getintopc.com/wp-content/uploads/2021/09/VideoHive-Happy-Kids-Slideshow-Premiere-Pro-MOGRT-Free-Download-GetintoPC.com_-300x169.jpg https://getintopc.com/wp-content/uploads/2021/09/VideoHive-Happy-Kids-Slideshow-Premiere-Pro-MOGRT-Direct-Link-Free-Download-GetintoPC.com_-300x169.jpg https://getintopc.com/wp-content/uploads/2021/09/VideoHive-Happy-Kids-Slideshow-Premiere-Pro-MOGRT-Full-Offline-Installer-Free-Download-GetintoPC.com_-300x169.jpg https://getintopc.com/wp-content/uploads/2021/09/VideoHive-Happy-Kids-Slideshow-Premiere-Pro-MOGRT-Latest-Version-Free-Download-GetintoPC.com_-300x169.jpg';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php