为此，您可以使用ajax或在同一页面上编写php代码。例如：

<form action="" method="POST">
<input type="text" placeholder="Input1" name="firstInput">
<input type="submit" name="submit">
</form>
<?php 

if(isset($_POST['submit'])){

$input=$_POST['firstInput'];

 //Here you can run your query make sure to make database connection first
$sql=mysqli_query($con,"query goes here"); 
}

?>