php html entitites

html entities	application are taking data and processing like form data
if customer entered data is if html data, then it shows html output in outputs so convert anything to text
How toconvert any data to text not an html
<?php
if (isset( $_POST['text'])){	how to check form is submitted, if form submitted
$text = htmlentities ($_POST['text']);	get the name date and convert to text and load to text variable
if(!empty($text))(	if it is not empty print thte text which is entered by uuer
echo $text;	if thers is no html entity ,it wil convert to html
}
else{
echo 'please enter some text..';	if no data after submit, tell to customer pls enter the data
}
}
?>
<form action="index.php" method="POST">	whenever customer is entered text, after submit I t displayed in php section display
<Input type="text" name="text">
<input type="submit" value="submit">
</form>

htmlentities

isset

htmlentities

!empty

if else

echo

post

how to conform customer is used submit how to show the customer entered data in html or text how to convert custoemr entered code to text code how to check that input  how to display customer entered data how to send customer enterd data ?