How to $_POST a dynamically assigned value in PHP?

Question

I created a table in mySQL that contains fields such as "name" etc, and I dynamically created several divs (containing a form and a button) relative to how many rows are in that table.

It looks like this :

<?php if ($tabLength > 0) {
      for ($x = 0; $x < $tabLength; $x++) {
        echo "<div class='data'>
                <ul class='data__list bg-grey'>
                <li class='data__item name-value'>" . $tab[$x][1] . "</li>
                <li class='data__item'>
                  <div class='data-modifiers'>
                    <form action='../extern/delete.ext.php' method='post'>
                      <input type='hidden' name='" . $tab[$x][1] . "' />
                      <button type='submit' name='delete-submit' class='btn btn-link'>Delete</button>
                    </form>
                  </div>
                </li>
              </ul>
            </div>";
      }
    }

Now I want that when I click the "Delete" button it delete specifically that div.

Thing is, since the inputs's "name" attributes are created dynamically (and which end up being "Bob", "Frank" and whatever for each div's input) I don't know how to use $_POST on the "delete.ext.php file.

Here's my code in delete.ext.php :

<?php
session_start();

if (isset($_POST["delete-submit"])) {
  require "dbh.ext.php";

  $name = $_POST[' --- what to put in here ? ---']

  $sql = "DELETE FROM persons WHERE name='" . $name . "';";
  $res = mysqli_query($conn, $sql);

  if (!$res) {
    header("Location: ../persons/persons.php?error=sqlerror");
    exit();
  } else {
    header("Location: ../persons/persons.php");
    exit();
  }
}

So, for example, if the "Delete" button I'm clicking on is in the div which contains an input with a dynamically created "name" attribut of "Frank", what should I pass in $_POST to effectively delete specifically that row from the mySQL table ?

Thanks !

---

Code update :

<?php if ($tabLength > 0) {
      for ($x = 0; $x < $tabLength; $x++) {
        echo "<div class='data'>
                <ul class='data__list bg-grey'>
                <li class='data__item name-value'>" . $tab[$x][1] . "</li>
                <li class='data__item'>
                  <div class='data-modifiers'>
                    <form action='../extern/delete.ext.php' 
 method='post'>
                      <input type='hidden' name='name' value='" . $tab[$x][1] . "' />
                      <button type='submit' name='delete-submit' class='btn btn-link'>Delete</button>
                    </form>
                  </div>
                </li>
              </ul>
            </div>";
      }
    }

And :

    <?php
    session_start();
    if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST["delete- 
    submit"])) 
    {
    require "dbh.ext.php";
    $sql = "DELETE FROM persons WHERE name= ?";
    $stmt = $conn->prepare($sql);
    $stmt->bind_param('s', $_POST['name']);
    $res = $stmt->execute();

    if (!$res) {
        header("Location: ../persons/persons.php?error=sqlerror");
        exit;
    } else {
        header("Location: ../persons/persons.php");
        exit();
    }
}

this is what's in dbh.ext.php

<?php 
$servername = "localhost"; 
$dBUsername = "root"; 
$dBPassword = ""; 
$dBName = "ruchesdb"; 
$conn = mysqli_connect($servername, $dBUsername, $dBPassword, $dBName); 
if(!$conn) { 
    die("Connection failed".mysqli_connect_error()); 
} 

Answer 1

Instead of placing some data in a name attribute, make the name attribute something you know and use the value attribute the unknown data, the name in this case.

So

<input type='hidden' name='" . $tab[$x][1] . "' />

becomes

<input type='hidden' name="thename" value='" . $tab[$x][1] . "' />

Now in the PHP you know what to look for. So all we need to fix now is the SQL Injection Attack issues, we do that by preparing the query with a parameter and then binding a value to the parameter like this

<?php
session_start();

if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST["delete-submit"])) 
{
    require "dbh.ext.php";

    // add a parameter to the query and not a concatenated value        
    $sql = "DELETE FROM `persons` WHERE `name` = ?";

    $stmt = $conn->prepare($sql);
    
    // bind the value to the parameter
    $stmt->bind_param('s', $_POST['thename']);
    $res = $stmt->execute();

    if (!$res) {
        header("Location: ../persons/persons.php?error=sqlerror");
        exit;
    } else {
        header("Location: ../persons/persons.php");
        exit();
    }
}