I have this .htaccess file that does some redirects and rewrites (removing extensions, etc.), but when I send the data using the POST method, it gets lost along the way.

Tried adding this condition to prevent request redirection using POST data, but it doesn't work.

Options +FollowSymLinks
RewriteEngine  On

RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^resume-.*/([0-9]+)$ /book.php?id= [QSA,L]


RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^channel-books/([0-9]+)/([0-9]+)/([0-9]+)$ /getChannelBooks.php?idChaine=&page=&orderby= [QSA,L]


RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^channel-books/([0-9]+)/([a-zA-Z]+)$ /getChannelBooks.php?idChaine=& [QSA,L]


RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^chaine-.*/([0-9]+)$ /model_contenu_de_chaine.php?idChaine= [QSA,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^search-([0-9]+)$ /search_page.php?search= [QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^audio-([0-9]+)$ /audiobook.php?id= [QSA]

RewriteRule ^$ /index.php [NC]

RewriteCond %{REQUEST_METHOD} !POST
RewriteCond %{THE_REQUEST} \s/([^.]+)\.php [NC]
RewriteRule ^ /%1 [NE,L,R=307]

RewriteRule ^([^\.]+)$ .php [NC]

This is what my post request looks like

This is the code in my destroy_session.php file

if(isset($_POST['action']) && $_POST['action'] == 'logout'){
   session_unset("username");
   session_destroy();
}