Get post id
![Get post id. Post php. методы get и post php. action forms. <form action="/action_page.php" onsubmit="return print_message()">.](https://ilmuweb.net/wp-content/uploads/2018/02/proses-form-post-0.jpg "Post php. методы get и post php. action forms. <form action="/action_page.php" onsubmit="return print_message()">.")
