global variable for dropdown list in plugin

[d.iandoli75]

In my plugin, in configuration screen I set up a dropdown menu. I retrieve the option list by calling my API

I have to call my API three times, so in the public function getContent I begin:

        $f24_template_url = $this->baseUrl.'/api/v0.3/GetTemplate';
        $f24_pdc_url = $this->baseUrl.'/api/v0.3/GetPdc';
        $f24_sezionali_url = $this->baseUrl.'/api/v0.3/GetNumerator';
	    $send_data = array();
        $send_data['apiKey'] = Configuration::get('PS_FATTURA24_API');
        $templates = $this->curlDownload($f24_template_url, http_build_query($send_data));
        $f24_pdc = $this->curlDownload($f24_pdc_url, http_build_query($send_data));
        $f24_sezionali = $this->curlDownload($f24_sezionali_url, http_build_query($send_data));

Later I build the list this way:

 $this->context->smarty->assign(
            array(... 'listaModelliOrdine' => $this->getTemplate(true),
				  ... 'listaModelliFattura' => $this->getTemplate(false),
                  ...)
			);

By getTemplate method I read $templates values and build the list according to my needs. Since I don't want to call APIs more than three times I want to set up a global variable which can be read from my getTemplate method, but now I read that global variables are forbidden in Prestashop. Any suggestions? Thanks

[d.iandoli75]

I solved this way: I left the variables and passed them as parameter to my getTemplate method.