Question

What is the right way for doing this?
It gives me an error:

$lingue       = array('IT','EN','FR');
$item         = new stdClass();
$item->IDCat  =  1;

foreach($lingue as $l){
    $item->Desc_{$l} = trim(addslashes($_POST['Desc_'.$l]);     
}

Answer 1

$lingue      = array('IT','EN','FR');
$item        = new stdClass();
$item->IDCat =   1;
foreach($lingue as $l){
    $item->{'Desc_'.$l}    = trim(addslashes($_POST['Desc_'.$l]));
}

The dynamic accessor must be enclosed with curly braces and you’r lacking a ) at the end of the trim() call.

Just to highlight the difference between $item->{'Desc_'.$l} = ... and $item->Desc_{$l} = ...:

//...
foreach($lingue as $l){
    $item->{'Desc_'.$l}    = trim(addslashes($_POST['Desc_'.$l]));
}
print_r($item);
// outputs:
/*
stdClass Object
(
    [IDCat] => 1
    [Desc_IT] => a
    [Desc_EN] => a
    [Desc_FR] => a
)
*/

while

//...
foreach($lingue as $l){
    $item->Desc_{$l}    = trim(addslashes($_POST['Desc_'.$l]));
}
print_r($item);
// outputs:
/*
stdClass Object
(
    [IDCat] => 1
    [Desc_] => Array
        (
            [IT] => a
            [EN] => a
            [FR] => a
        )

)
*/

This is actually the same as

//...
foreach($lingue as $l){
    $item->Desc_[$l]    = trim(addslashes($_POST['Desc_'.$l]));
}

Seems to be an imprudence in the parser.