echo "$bts = preg_replace(\"/([^><]*)thread-([^><]*)-([^><]*).html/\", \"\\2\", \$bts);";这样输出$bts = preg_replace("/([^><]*)thread-([^><]*)-([^><]*).html/", "\2", $bts);少了一个斜杠这个是我喜欢输出的
$bts = preg_replace("/([^><]*)thread-([^><]*)-([^><]*).html/", "\\2", $bts);需要添加什么
$bts = preg_replace("/([^><]*)thread-([^><]*)-([^><]*).html/", "\\2", $bts);需要添加什么
echo "$bts = preg_replace(\"/([^> <]*)thread-([^> <]*)-([^> <]*).html/\", \"\\2\", \$bts);";
echo "$bts = preg_replace(\"/([^> <]*)thread-([^> <]*)-([^> <]*).html/\", \"\\\\2\", \$bts);"; echo会自动删除转义字符\