在下一行
<form method="post" action="display()">
<form method="post" action="yourFileName.PHP">
<input type="text" name="studentname">
<input type="submit" value="click" name="submit"> <!-- assign a name for the button -->
</form>
<?PHP
function display()
{
echo "hello ".$_POST["studentname"];
}
if(isset($_POST['submit']))
{
display();
}
?>
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