在字符串PHP中@是什么意思？(不是错误抑制运算符)

Question

可能重复:
drupal中的@(at符号)

我知道有时它与错误抑制有关,但我正在看Drupal代码,我无法识别语法:

例1:

$batch = array(
'operations' => $operations,
'finished' => '_install_profile_batch_finished',
'title' => st('Installing @drupal', array('@drupal' => drupal_install_profile_name())),
'error_message' => st('The installation has encountered an error.'),
);

例2:

drupal_set_title(st('@drupal installation complete', array('@drupal' => drupal_install_profile_name())));

例3:

$output .= '<p>'. (isset($messages['error']) ? st('Please review the messages above before continuing on to <a href="@url">your new site</a>.', array('@url' => url(''))) : st('You may now visit <a href="@url">your new site</a>.', array('@url' => url('')))) .'</p>';

Answer 1

这与php无关,但与drupal有关.@drupal是模板引擎drupal使用的变量.