I have a simple page written with (php + html) I just want user enter value into prompt box then when click button the value send to textbox. I tried below code but I get error inside textbox.
<?php
echo "<script>var age=prompt('Enter your age')</script>";
$age="<script>document.write(age)</script>";
echo $age ;
?>
<html>
<input type="text" name="age" id="age" value="<?php echo ($age) ; ?>" >
</html>