function command_exists in Environment Indicator 7.2

Determines if a command exists on the current environment.

Parameters

string $command: The command to check.

Return value

bool TRUE if the command has been found; otherwise, FALSE.

1 call to command_exists()

environment_indicator_environment_indicator_matched_indicator_alter in ./environment_indicator.module

Implements hook_environment_indicator_matched_indicator_alter().

File

./environment_indicator.module, line 641

Module implementation file.

Code

function command_exists($command) {
  if ($obj = cache_get('command_exists:' . $command)) {
    return $obj->data;
  }
  $where_is_command = PHP_OS == 'WINNT' ? 'where' : 'which';
  $command_return = environment_indicator_execute_os_command("{$where_is_command} {$command}");
  $output = !empty($command_return);
  cache_set('command_exists:' . $command, $output);
  return $output;
}