SimpleSAML\Locale\Translate::t PHP Method

    public function t($tag, $replacements = array(), $fallbackdefault = true, $oldreplacements = array(), $striptags = false)
    {
        $backtrace = debug_backtrace();
        $where = $backtrace[0]['file'] . ':' . $backtrace[0]['line'];
        if (!$fallbackdefault) {
            \SimpleSAML\Logger::warning('Deprecated use of new SimpleSAML\\Locale\\Translate::t(...) at ' . $where . '. This parameter will go away, the fallback will become' . ' identical to the $tag in 2.0.');
        }
        if (!is_array($replacements)) {
            // TODO: remove this entire if for 2.0
            // old style call to t(...). Print warning to log
            \SimpleSAML\Logger::warning('Deprecated use of SimpleSAML\\Locale\\Translate::t(...) at ' . $where . '. Please update the code to use the new style of parameters.');
            // for backwards compatibility
            if (!$replacements && $this->getTag($tag) === null) {
                \SimpleSAML\Logger::warning('Code which uses $fallbackdefault === FALSE should be updated to use the getTag() method instead.');
                return null;
            }
            $replacements = $oldreplacements;
        }
        if (is_array($tag)) {
            $tagData = $tag;
            \SimpleSAML\Logger::warning('Deprecated use of new SimpleSAML\\Locale\\Translate::t(...) at ' . $where . '. The $tag-parameter can only be a string in 2.0.');
        } else {
            $tagData = $this->getTag($tag);
            if ($tagData === null) {
                // tag not found
                \SimpleSAML\Logger::info('Template: Looking up [' . $tag . ']: not translated at all.');
                return $this->getStringNotTranslated($tag, $fallbackdefault);
            }
        }
        $translated = $this->getPreferredTranslation($tagData);
        foreach ($replacements as $k => $v) {
            // try to translate if no replacement is given
            if ($v == null) {
                $v = $this->t($k);
            }
            $translated = str_replace($k, $v, $translated);
        }
        return $translated;
    }

 /**
  * Test SimpleSAML\Locale\Translate::t().
  */
 public function testTFallback()
 {
     $c = \SimpleSAML_Configuration::loadFromArray(array());
     $t = new Translate($c);
     $testString = 'Blablabla';
     // $fallbackdefault = true
     $result = 'not translated (' . $testString . ')';
     $this->assertEquals($result, $t->t($testString));
     // $fallbackdefault = false, should be a noop
     $this->assertEquals($testString, $t->t($testString, array(), false));
 }