Enabling Drucall Module Creates a Parse Error

Hi,

I have been trying to set up Drucall for its video capabilities on my pantheon.io website. I have downloaded and installed the module and all of its dependencies, but I keep getting this error whenever I try to enable the Drucall module:

Parse error: syntax error, unexpected '[' in */sites/all/modules/drucall/drucall.module on line 59

Line 59 of drucall.module is:

foreach ([ "jssip", "jscommunicator", "arbiterjs", "jqueryi18nproperties", "fontawesome" ] as $libname) {

The section of code looks like this:

function drucall_call() {

  global $language;

  // Make sure the necessary jQuery UI components are available on
  // the page, Drupal loads core jQuery automatically but not jQuery UI
  drupal_add_library('system', 'ui.draggable');
  drupal_add_library('system', 'ui.resizable');

  // We use the `libraries' module to load javascript dependencies:

  foreach ([ "jssip", "jscommunicator", "arbiterjs", "jqueryi18nproperties", "fontawesome" ] as $libname) {
    if (!($library = libraries_detect($libname))) {
      $error = "failed to load an essential component";
      $error_msg = "failed to load $libname - please install it (check the DruCall instructions)";
    }
    if($library && empty($library['installed'])) {
      $error = $library['error'];
      $error_msg = $library['error message'];
    }
    if(isset($error)) {
      drupal_set_message($error_msg, $error, FALSE);
      return $error;
    } 
    libraries_load($libname);
  }

Any help would be appreciated in resolving this.

Thanks!