Syntax error in WeatherMapDataSource_zabbix.php: line 50

Good day.
I found a syntax error in WeatherMapDataSource_zabbix.php, line 50.
When trying to run ./weathermap with included zabbix datasource plugin it returns:
PHP Parse error: syntax error, unexpected '[' in /tmp/weathermap/lib/datasources/WeatherMapDataSource_zabbix.php on line 50

$in_value = $this->zabbixApi->getItemLastValue($host,$zabbix_key, $in)['lastvalue'];
$raw_out_value = $this->zabbixApi->getItemLastValue($host, $zabbix_key, $out);
$out_value = $raw_out_value["lastvalue"];

Looks like it was fixed for out_value, but not for in.
Worked variant:

$in_value = $this->zabbixApi->getItemLastValue($host,$zabbix_key, $in)['lastvalue'];

$raw_out_value = $this->zabbixApi->getItemLastValue($host, $zabbix_key, $out);
$raw_in_value = $this->zabbixApi->getItemLastValue($host, $zabbix_key, $in);
$in_value = $raw_in_value["lastvalue"];
$out_value = $raw_out_value["lastvalue"];
$data_time = $raw_out_value["lastclock"];

[amousset]

The problem is that the getArray()[1] syntax was introduced in PHP 5.4 (cf. PHP documentation), and your seem to be using an older version. Thank you for reporting, there is no reason to require PHP 5.4, fixed in 932240a.

Oh, sorry. I forgot to specify my software versions. Anyway, thanks a lot for this plugin