Maximum occurrences of an item

Question

I need to go through the data and find out the maximum number of occurrences of an item. I have the following structure

array(5) {
    [0]=>
     object(stdClass)#26 (6) {
      ["num_dia"] => string(1) "5"
      ["num_semana"] => string(2) "46"
      ["descricao"] => string(5) "Teste"
     }
    [1]=>
     object(stdClass)#27 (6) {
      ["num_dia"]=> string(1) "5"
      ["num_semana"]=>string(2) "46"
      ["descricao"]=>string(8) "Testeeee"
   }
    [2]=>
     object(stdClass)#28 (6) {
      ["num_dia"]=>string(1) "6"
      ["num_semana"]=>string(2) "46"
      ["descricao"]=>string(5) "Teste"
   }
    [3]=>
     object(stdClass)#29 (6) {
      ["num_dia"]=>string(1) "6"
      ["num_semana"]=>string(2) "47"
      ["descricao"]=>string(7) "Teste 1"
   }
   [4]=>
     object(stdClass)#30 (6) {
      ["num_dia"]=>string(1) "5"
      ["num_semana"]=>string(2) "48"
      ["descricao"]=>string(7) "Bla bla"
    }
}

I did it at the time.

   $count = 0;
    $ativ_max = [];
    $atual_max = 0;
    $antigo_max = 0;

            for ($i=0; $i < count($ativ_semanal); $i++) {
        for ($j=0; $j < count($ativ_semanal[$i]->num_semana); $j++) {
            if ($i == 0|| $ativ_semanal[$i]->num_semana == $ativ_semanal[$i-1]->num_semana) {
                if ($i == 0 || $ativ_semanal[$i]->num_dia == $ativ_semanal[$i-1]->num_dia) {
                    $atual_max++;
                }else{
                    if ($antigo_max < $atual_max) {
                        $antigo_max = $atual_max;
                        if ($i == count($ativ_semanal[$i]->num_semana)) {
                            $ativ_max = array($ativ_semanal[$i]->num_semana => $antigo_max);
                        }
                    }
                    $atual_max = 1;
                }
            }else{
                var_dump($antigo_max);
                $ativ_max = array($ativ_semanal[$i]->num_semana => $antigo_max);
                $atual_max=1;
            }
        }
    }

It is creating the associative array

print_r($item); // Array ( [46] => 3 [47] => 1 [48] => 1 )

But only the first one is certain (índice 46), the second is adding +1 to 2 of índice 46, he should be 2 and not 3. Since the maximum of items was on the day 5, and were 2 items.

Answer 1

$itens = [];
foreach ($ativ_semanal as $ativ) {
    if (array_key_exists($ativ->num_semana, $itens)) {
        $itens[$ativ->num_semana]++;
    } else {
        $itens[$ativ->num_semana] = 1;
    }
}

Is that what you’re trying to do? Because it looks like that’s what you want out of it, but it doesn’t match your question. In your question you say you want to count the number of items (which is defined by the description), but in the output you apparently don’t care about the type, just the amount of items in a given week.