How to insert an instruction into the array only if it is true?

Question

I need to somehow verify if there is any element within a given array and if there is, put a whole string in a specific place. For example:

I need to check whether $categoria is not empty

$categoria = array($values);

And after checking that it is not empty, insert the string below inside filter

$categoria = " 'Categoria' => array($values) ";

The array is this and I have to insert these instructions into the filter:

$dados = array (
    'fields' => array(
        'ImoCodigo', 
        'Categoria', 
        'Bairro',
        'ValorVenda', 
        'Dormitorios', 
        'Vagas', 
        'FotoDestaque'
    ),
    'filter' => array(
        // As strings devem ser inseridas exatamente aqui separadas por vírgula
    ),
    'paginacao' => array(
        'pagina' => 1,
        'quantidade' => 50
    )   
);

The end result would look like this:

...
'filter' => array(
    'Categoria' => array($values),
    'Cidade' => array($cidades),
    'ValorVenda' => array($preco)
),
...

Answer 1

Checks that the value is not empty. If empty, arrow is null.

Example of how to add to index filter array $dados:

'filter' => array(
    'categoria' => ((!empty($values))? array($values) : null)
),

But it seems strange to assign $values as an array array($values). Is that right? You’re just creating unnecessary memory space.

If you do not want the index categoria when empty, make the following logic:

Create the array $dados normally, however, without the "filter"

$dados = array (
 ....
);

With the array created, just add or remove the indexes as you wish:

((!empty($values))? $dados['filter']['categoria'] = array($values) : '');

Full example:

$dados = array (
    'fields' => array(
        'ImoCodigo', 
        'Categoria', 
        'Bairro',
        'ValorVenda', 
        'Dormitorios', 
        'Vagas', 
        'FotoDestaque'
    ),
    'paginacao' => array(
        'pagina' => 1,
        'quantidade' => 50
    )   
);
((!empty($values))? $dados['filter']['categoria'] = array($values) : '');