I would like to validate the id of the GET without javascript, only with php. I'm having a hard time.
<a id="exemplo-'.$resultado['id'].' " href="pagina.php">
<?php
/*com javascript*/
$id = explode('-',$_POST['exemplo']);
$ext = end($id);
/*com O php se valida id assim?*/
$id = explode('-',$_GET['exemplo']);
$ext = end($id);
?>
When submitting requests via GET, the parameters and values must be sent by the url, the id of the html tags is useless.
Modify your link to:
<a href="pagina.php?id=<?php echo $resultado['id'];?>">EDITAR</a>
You can do a preliminary test to know if the index name and past value is very useful, like this:
echo '<pre>';
print_r($_GET); //ou $_POST em outras ocasiões
Validation of id:
if(isset($_GET['id']) && ctype_digit($_GET['id'])){
echo 'válido';
}else{
echo 'inválido';
}