Validating Number Form Input

Problem:- Validating Number Form Input

Solution:-

<?php 

if ($_SERVER['REQUEST_METHOD']=='GET') {?>

<form action="<?php echo htmlentities($_SERVER['SCRIPT_NAME']); ?>" method="POST" >
	<input type="text" name="number"><br>
	<input type="submit" value="Show">
</form>

<?php
}else{
	if (filter_input(INPUT_POST, 'number', FILTER_VALIDATE_INT)) {
		echo $_POST['number'];
		}else{
			echo $_POST['number'], ' isn\'t a number';
		}
}
	


 ?>