Method getParams

/**
 * Method to parse the parameters of an extension, build the JSON string for its default parameters, and return the JSON string.
 *
 * @return  string  JSON string of parameter values
 *
 * @since   3.1
 * @note    This method must always return a JSON compliant string
 */
public function getParams()
{
    // Validate that we have a fieldset to use
    if (!isset($this->manifest->config->fields->fieldset)) {
        return '{}';
    }
    // Getting the fieldset tags
    $fieldsets = $this->manifest->config->fields->fieldset;
    // Creating the data collection variable:
    $ini = array();
    // Iterating through the fieldsets:
    foreach ($fieldsets as $fieldset) {
        if (!\count($fieldset->children())) {
            // Either the tag does not exist or has no children therefore we return zero files processed.
            return '{}';
        }
        // Iterating through the fields and collecting the name/default values:
        foreach ($fieldset as $field) {
            // Check against the null value since otherwise default values like "0"
            // cause entire parameters to be skipped.
            if (($name = $field->attributes()->name) === null) {
                continue;
            }
            if (($value = $field->attributes()->default) === null) {
                continue;
            }
            $ini[(string) $name] = (string) $value;
        }
    }
    return json_encode($ini);
}