'post_content' => $thepagecontent ends up insert after variable

Hi,
When i’m trying to indert content in a post, with a variable, the first one ends up inserting a return in the database for the reason, which make the code non-exploitable.

$thepagecontent = '<img src="'.$affiche.'" /><img src="https://img.youtube.com/vi/'.$youtube.'/hqdefault.jpg" />';
		$my_post = array(
			  'post_title'    => $thetitle." ".$fulltitle,
			  'post_status'   => 'publish',
			  'post_author'   => 1,
			  'post_category' => array( $cat_id),
			  'post_content' => $thepagecontent
			);
			$post_id = wp_insert_post( $my_post )

As a result, the youtube image shows up, not the affiche one

<img src="https://fr.web.img1.acsta.net/pictures/14/11/14/11/08/371396.jpg
"/><img src="https://img.youtube.com/vi/S7jE27USh68/hqdefault.jpg" />