<?php
if(isset($_POST['btn'])){
//do some task
?>
<script type="text/javascript">
var e = document.getElementById('testForm'); e.action='test.php'; e.submit();</script>
<?php
}
?>
<form name="testForm" id="testForm" method="POST" >
<input type="submit" name="btn" value="submit" autofocus onclick="return true;"/>
</form>You may want to know that removing semicolon is optional sometime but need to know the condition when it can be removed and when it can't be.
-------------------------------------------------------------------------
// Example 1: PHP script with closing tag at the end.
<?php
// php code
// you can remove semicolon
mysqli_close( $db )
?>
// Example 2: PHP script without closing tag at the end.
<?php
// php code
// you can't remove semicolon
mysqli_close( $db )
-----------------------------------------------------------------------