I cannot declare variable inside id

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@$c_id = $_POST['numero'];
@$data_aa = $_POST['data_aa']; // Data esta vazio

if($data_aa == ''){
$var = "oi";
echo "$var";
}

If I put the variable $var outside the if(), works normally.

php pdo variables post if

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1 answer

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I managed by making != empty (null)

if ($data_aa != null) {
    // funcionou!!!
}

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