What can I use to differentiate two POST requests in php

Question

I am making a web system with php, which has a conditional deviation to check whether the request is a repeated post or not, I did this to ensure that I would not keep giving multiple repeated Inserts in the database, however there is a part of the system that needs to let repeat the post request even if it is repeating, and this is not happening, Mfim the questions are:

How the server differentiates a POST request and How can I differentiate this post request.

Answer 1

This depends a lot on the structure of your code. But an idea would be to pass a HTML Hidden field, with a specific code. Based on this code passed through the Hidden field you could allow or not repeated insertion;

Example:

<form method="post">
    <input type="hidden" name="tipo_insercao" value="unica"/>
    <input type="text" name="email" placeholder="Email"/>
    <input type="submit"/>
</form>

PHP would react more or less like this:

<?php
    if(isset($_POST['tipo_insercao'])){
       $tipo_insercao = $_POST['tipo_insercao'];
       $email = $_POST['email'];

       //Aqui fazemos o que for preciso com os dados. Inserir no banco?

       if($tipo_insercao=="unica"){
           unset($_POST);
       }
    }
?>

Answer 2

Sends another parameter via post, for example executing, if it is true you execute, otherwise you do not execute.