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在網路上查到以下的原始碼 .... 
 
請問一下 要如何修改 才能檢查 上傳的檔案 是否檔名有重複呢?
 
$uploaddir = '';
$uploadfile = $uploaddir.basename($_FILES['myfile']['name']);

echo "<pre>";

if (move_uploaded_file($_FILES['myfile']['tmp_name'], iconv("utf-8", "big5", $uploadfile))) {
    echo "上傳完成 \n";
    echo "檔案名稱:" . $_FILES["myfile"]["name"] . "<BR>";
    echo "檔案大小:" . $_FILES["myfile"]["size"];
    echo " bytes" . "<BR>";
    echo "檔案類型:" . $_FILES["myfile"]["type"] . "<BR>";

} else {
    echo "上傳失敗 \n";
 
}

echo "</pre>";
?>
 

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