How to get value $ _POST automatically?

If I understood correctly, your question would look like this:

<form>
   <input type="text" name="nome">
</form>

foreach($_REQUEST as $key => $value) {
    if($key == 'nome') {
        echo $value;
    }
}

I think what you want is to try to create normal variables based on the values that $_POST has.

Although this is not a good idea because it can open security holes , you can do this as follows:

foreach ( $_POST as $chave => $valor ) { $$chave = $valor; }

That creates a variable with the name that comes in $_POST and for each value that comes there. Then just use them as if they were normal variables:

echo ($nome);

Alternatively, name creation can be done at the expense of the extract function as Anderson Carlos Woss and rray have suggested. To do this, just call the function:

extract($_POST, EXTR_PREFIX_SAME, "prefixo");

The parameter EXTR_PREFIX_SAME indicates that if there is a name collision a prefix must be created, with the text relative to the 3rd parameter, which in the above example was "prefixo" ,

Example running

It was something like that that I wanted

print_r( $_POST);

foreach($_POST as $field => $value)
{
    echo $field;
}