#### Question :

I submit the javascript 2 arrays with the following data:

```
values = {'tipoLicenciamento':tipoLicenciamento,'modulo':modulo} ;
values = {"modulo":modulo,"categoria":6};
```

In my php I get something like this when I give `printr()`

```
Array ( [modulo] => 2 [categoria] = 6)
Array ( [tipoLicenciamento] => 1 [modulo] => 2 )
```

It happens that I have 2 different buttons for the form, where each one generates this array. Can I know the name of the array positions?

#### Answer :

To get the key names of an array one way is to use the function `array_keys()`

```
$arr = array('modulo' => 2, 'categoria' => 6, 'tipoLicenciamento' => 3);
$chaves = array_keys($arr);
echo "<pre>";
print_r($chaves);
```

Output:

```
Array
(
[0] => modulo
[1] => categoria
[2] => tipoLicenciamento
)
```

Another way, when appropriate, is to invert the values by the keys, `array_fliper()`

does this. It is important to remark that if there are two or more equal values, the one that will prevail is the last key in the `outra`

case.

```
$arr = array('modulo' => 2, 'categoria' => 6, 'tipoLicenciamento' => 3, 'outra' => 3);
$chaves = array_flip($arr);
echo "<pre>";
print_r($chaves);
```

Output:

```
Array
(
[2] => modulo
[6] => categoria
[3] => outra
)
```

The function you are looking for (if I understand correctly), is called `array_keys()`

.

To use:

```
<?php
$keys = array_keys($_POST['nome']);//Armazena nome das posições como um array
print_r($keys);//Saída: Array ([0] => key [1] => other)
```

You can find out more about the php.net page

If you already scroll through the array , you can get the key directly with `foreach`

:

```
foreach($_POST as $key => $value) {
echo $key;
}
```

See working at Ideone .

Obviously this is only effective if you need to go through the array . If you only want to get the list of keys, use `array_keys`

, as indicated in the other answers.