这属于stackoverflow。无论如何，这里有一个解决方案：

$content = preg_replace_callback(\'/\\%replaceContent:{(.*?)}\\%/\', \'do_replacements\', $content);

function do_replacements($matches){

  $type = $matches[1]; // here\'s your {type}
  $replacement = "...replacement for {$type}";  

  return $replacement; 
}