fixed a bug when used the function "in_array"

[jkhhjkhiukhjhukjhkh]

I used your code to convert a PHP array to a .toml file, but when I used TomlBuilder class to build my .toml file, the program always threw the DumpException.
When my array included the zero element, your expression return true, made program stop.

if (in_array($key, $this->keyListArryOfTables)) {
    throw new DumpException(
        sprintf('The table %s has already been defined as previous array of tables', $key)
    );
}

I debugged it and found this bug.document of in_array

I added the third param true in your code, I guessed it would always suit for your scene.
In that case, I could build my program easily.

Additionally, there were some mistakes in the code. For example, the variable $this->keyListArryOfTables was a key=>value array, so I thought array_key_exists would be more correct than in_array.

if (in_array($key, $this->keyListArryOfTables, true)) {
        throw new DumpException(
        sprintf('The table %s has already been defined as previous array of tables', $key)
    );
}

if (false == isset($this->keyListArryOfTables[$key])) {
        $this->keyListArryOfTables[$key] = 0;
        $this->addKeyToKeyList($key);
    } else {
        $counter = $this->keyListArryOfTables[$key] + 1;
        $this->keyListArryOfTables[$key] = $counter + 1;
}

[yosymfony]

Could you describe your use-case with an Toml example?

[jkhhjkhiukhjhukjhkh]

Please see my new PR.
In my branch builder, if you checkout the TomlBuiler.php to your vision 7c60cdf, you will find the program throw the exception, You can easy debug it.

if (in_array($key, $this->keyListArryOfTables)) {
    var_dump($key);
    var_dump($this->keyListArryOfTables);
    var_dump(in_array($key, $this->keyListArryOfTables));
    var_dump(in_array($key, $this->keyListArryOfTables, true));
    var_dump(array_key_exists($key, $this->keyListArryOfTables));
    throw new DumpException(
        sprintf('The table %s has already been defined as previous array of tables', $key)
    );
}

The output:

string(5) "a2.b1"
array(1) {
  'a2' =>
  int(0)
}
bool(true)
bool(false)
bool(false)
Fatal error: Uncaught Yosymfony\Toml\Exception\DumpException: The table a2.b1 has already been defined as previous array of tables in TomlBuilder.php on line 294

[yosymfony]

I just resolved your issue. The problem was I was looking for a key in the array values. I just committed that change. In a few days, I'll do a release.

[yosymfony]

Thank you for this PR. It'll be fixed in v1.0.4