Problem trying to get value from an array

Question

I’m trying to work with an array I receive by POST, but I’m not getting the values contained within the array.

When I give print_r($_POST) get:

Array ( [access] => Array ( ['Kminput'] => 1000 ['Timeout'] => 2017-06-16 14:20:58 ['status'] => 0 ) )

I’ve tried to access it using $_POST["acesso"]["KMEntrada"] but get the following error message:

Undefined index: Kmentrada

Answer 1

Have almost certainty that its biggest problem is in the querystring, you’re passing her, most likely thus:

request = function() {
  $.ajax({
    url: "https://requestb.in/1fzmwxx1",
    type: "POST",
    data: {
      "acesso['KMEntrada']": 1000,
      "acesso['HorarioSaida']": '2017-06-16 14:20:58',
      "acesso['Status']": 0
    },
    success: function(returnjson) {},
    error: function(returnjson) {}
  });
}();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

See on requestb.in how the information arrives:

RAW BODY

Access%5B'Kminput'%5D=1000&access%5B'Timeout'%5D=2017-06-16+14%3A20%3A58&access%5B'Status'%5D=0

To see better:

RAW BODY URL ENCODED

access['Kmentrada']=1000&access['Horariosaida ']=2017-06-16 14:20:58&access['Status']=0

When all you had to do was pass like this:

RAW BODY

%5BKMEntrate%5D=1000&access%5BHorarioSaida%5D=2017-06-16+14%3A20%3A58&access%5BStatus%5D=0

RAW BODY URL ENCODED

access[Kminput]=1000&access[Scheduleleft]=2 017-06-16 14:20:58&access[Status]=0

What you did to access variables within the array $_POST['acesso']["'FrotaID'"] works as a patch, a gambiarra, and not as a definitive solution, it is not recommended...

Because it wouldn’t be recommended?

If in the backend you, or some other developer by chance try to convert the $_POST for an object, you will not be able to access the variables within the variable acesso, see an example of what I mean:

$_POST["acesso"] = (object) Array( "'KMEntrada'" => 1000, "'HorarioSaida'" => '2017-06-16 14:20:58', "'Status'" => 0, "teste" => 540 );
$teste = (object) $_POST; // casting da variável
echo $teste ->acesso->teste // Imprime 540
echo $teste ->acesso->'KMEntrada' // invalido

If by chance you try to access json using javascript, you will also have a syntax error:

$arr = array(
    "acesso" => array(
        "'KMEntrada'" => 1000,
        "'HorarioSaida'" => "2017-06-16 14:20:58",
        "'Status'" => 0
    )
);
$v = json_encode($arr);
echo "<script>";
echo "var a = ".$v.";";
echo "console.log(a.acesso);";
echo "console.log(a.acesso.'KMEntrada');";
echo "</script>";

Furthermore, I do not see any reasonable reason to pass a variable with special characters, if this statement is incorrect, I even ask you to correct me:

There is no context where it is valid to define a variable in a queryString with special characters like quotes, arroba, dollar sign and so on, this could even cause problems when recovering variables passed in the backend.

---

Just know how you are sending this array to your backend and make the fix there, if it is by ajax for example:

request = function() {
  $.ajax({
    url: "https://requestb.in/1fzmwxx1",
    type: "POST",
    data: {
      "acesso[KMEntrada]": 1000,
      "acesso[HorarioSaida]": '2017-06-16 14:20:58',
      "acesso[Status]": 0
    },
    success: function(returnjson) {},
    error: function(returnjson) {}
  });
}();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

See on requestb.in the information that arrives:

FORM/POST PARAMETERS

[Scheduleexit]: 2017-06-16 14:20:58

access[Status]: 0

access[Kminput]: 1000

RAW BODY

%5BKMEntrate%5D=1000&access%5BHorarioSaida%5D=2017-06-16+14%3A20%3A58&access%5BStatus%5D=0

This way, ai yes you can easily access the variables in the correct way, that would be $_POST['acesso']['KMEntrada']

Answer 2

To return any value do so

$meuArray = array('acesso' => array('KMEntrada' => 1000, 'HorarioSaida' => '2017-06-16 14:20:58', 'Status' => 0));

echo $meuArray['acesso']['KMEntrada'] ."\n";

echo $meuArray['acesso']['HorarioSaida'] ."\n";

echo $meuArray['acesso']['Status'] ."\n";

example - ideone

Answer 3

To recover the value, I had to enter the following code:

$_POST['acesso']["'FrotaID'"]