DELETE function with php and mysql

Question

deleta.php:

<?php
// quero transformar esse script em função e chama-lo no link
// deleta um unico post
        include("config.php");
        $id = $_GET['id'];  
        $sqlInsert = "DELETE FROM conteudo WHERE id = '$id'";   
        $deletaPost = mysqli_query($conecta,$sqlInsert);

    if($deletaPost) {
            header("Location: ".$_SERVER['HTTP_REFERER']."");
            exit;
    } else {
        echo mysqli_error($conecta);
    }

 // o script abaixo deleta através de um checkbox, e elimina varios de uma vez.
// quero que esse seja o padrão, e o script acima seja uma função que só funcione quando chamada.
    if( !empty( $_POST['deletar'] ) ) {
       $groups = array_chunk( $_POST['deletar'], 50 );
       foreach ( $groups AS $group ) {
    $group = implode('\',\'', $_POST['deletar']);
            $query = 'DELETE FROM conteudo WHERE id IN (\''. $group .'\')';
           $deleta = mysqli_query($conecta, $query);
          // executa a query
       }

        if($deleta) {
           header("Location: ".$_SERVER['HTTP_REFERER']."");
           exit;
    } else {
        echo mysqli_error($conecta);
    }

    } else {
        header("Location: ".$_SERVER['HTTP_REFERER']."");
           exit;
    }

    ?> 

HTML:

<a href="deleta.php?id=<?php echo $row['id']; ?>">Excluir</a>  

How should I turn the delete script into a function, and then call on the link?
I want to do this because on the page deleta.php I already have another script, and the two are giving conflicts. With this, I decided to turn the script into a function and call it on the link. How to act

Answer 1

Create a function it can take two arguments, the first is the connection and the second the id to be deleted, make the validation if input sent by the user is number, if positive effect delete and return true, takes the return of the function and redirects the user in case of success.

In the link, you should continue to call the file delete.php and in it call the function.

delete.php

include 'conexao.php';
function delete($conexao, $id){
   //código a ser desenvolvido
}

$id = isset($_GET['id']) && ctype_digit($_GET['id']) ? $_GET['id'] : null;
if(delete($conexao, $id)){
   header('delteSucesso.php');
}else{
   echo 'erro ao excluír o registro';
}