How to cut or (replace) the beginning of a link using PHP?

Question

PHP

Good afternoon.
Help me please!
I have a frame in my php file Frame
border="0" framespacing="0" name="frmsite" src="<?=$urlsite ?>"The bracket
<?=$urlsite ?> is a link to the YouTube video page https ://www.youtube.com/watch?v=_Tc1HCPTmqc
somehow I need to cut or (replace) the beginning
I need this - https://www.youtube.com/watch?v=
replace with this - https://www .youtube.com/embed/
what would be like this
Bracket frame border="0" framespacing="0" name="frmsite" src=" https://www.youtube.com/embed/_Tc1HCPTmqc?autoplay... " Bracket
But the link to the video is given only by these code <

Answer 1

<?= str_replace("watch?v=", "embed/", $urlsite) ?>

Answer 2

parse_url() and forming a new URL from pieces of the old one.