求助 php　word表格制作问题,哪位高人帮帮忙

问题描述：表格单元内容出现乱码
代码如下：
<?php
$word = new COM("word.application") or die("无法启动 Word 程式！");
$word->Visible= true;
$word->WindowState = 0;
$doc=$word->Documents->Add();
$doc->Sections->Add($word->Selection->Range,0);

$col=1;
$table = $doc->Tables->Add($word->Selection->Range,5,9);
$table->Cell(1,$col++)->Range->InsertBefore("收文部门");
$table->Cell(1,$col++)->Range->Text ="来文标题";
$table->Cell(1,$col++)->Range->Text ="文号";
$table->Cell(1,$col++)->Range->Text ="秘级";
$table->Cell(1,$col++)->Range->Text ="发文单位";
$table->Cell(1,$col++)->Range->Text ="来文时间";
$table->Cell(1,$col++)->Range->Text ="份数";
$table->Cell(1,$col++)->Range->Text ="签收人";
$table->Cell(1,$col++)->Range->Text ="备注";
$word->Documents[1]->SaveAs("e:\\code\\html\\word.doc");
$word->Quit();
?>
出现症状如下：表格单元内容为
收文部门 tio　     签收人 鉌 等