gistfile1.php

<?php

function toMingKuoYear1($matches)
{
  $year = $matches[1];
  $year = $year - 1911;
  return " title='$year年'";
}

function toMingKuoYear2($matches)
{
  $year = $matches[1];
  $year = $year - 1911;
  return " $year年 ";
}


function toMingKuoYear3($matches)
{
  $year = $matches[1];
  $year = $year - 1911;
  return ">$1年</a>";
}

$link_html = preg_replace_callback("/ title='([\d]{4})'/", toMingKuoYear1, $link_html);
$link_html = preg_replace_callback("/ ([\d]{4}) /", toMingKuoYear2, $link_html);
$link_html = preg_replace_callback("/>([\d]{4})<\/a>/", toMingKuoYear3, $link_html);