所以我遇到了一个互联网搜索无济于事的问题。我正在尝试找到一种方法来回显"未找到结果"，当有人单击提交并且它显示为空时。我过去做过类似的事情，但不记得我是怎么做到的。这是我到目前为止所拥有的，它不起作用：
<?php
if ( empty($row_Recordset1) && isset($_POST['Submit']) ){
echo "No results found";
}
有什么想法吗？
在我看来，
你忘记写了很多代码......首先，我建议您在开头检查 $_POST['提交']，以便通过简单地打开 URL（直接将其写入浏览器地址栏中或点击上一页的链接）或单击表单按钮来了解页面是否已加载：
<?php
if (isset($_POST['Submit'])){
// someone submitted the form
// so, here you must check if results are available according to the submitted data
//here all the necessary code to open a database connection, perform a mysql query and save the results in $row_Recordset1
//then you can check if the query returned no results
if (empty($row_Recordset1) {
echo "No results found";
}
else {
// the code to print results here
}
}
else {
// no one submitted the form
// so, here you should put the code to draw your html form
}
?>