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PHP program to demonstrate the use of $_POST superglobal variable

Here, we are going to demonstrate the use of $_POST superglobal variable in PHP.
Submitted by Nidhi, on November 24, 2020

Here, we will demonstrate the use of the $_POST superglobal variable by creating a submit button using the post method with the help of a form tag.

Program/Source Code:

The source code to demonstrate the use of the $_POST superglobal variable is given below. The given program is compiled and executed successfully.

<html>
<body>

<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
  Enter country name: <input type="text" name="country">
  <input type="submit">
</form>

<?php
//PHP program to demonstrate the use 
//of $_POST superglobal variable.
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
    $country = $_POST['country'];
    printf("Country Name: %s<br>", $country);
}
?>

</body>
</html>

Output:

o/p

Explanation:

In the above program, we create a form tag with the post method that contains an input field and a submit button.

if ($_SERVER["REQUEST_METHOD"] == "POST") 
{
    $country =$_POST['country'];
    printf("Country Name: %s<br>",$country);
}

In the above code, we checked the request method using $_SERVER superglobal, then we get the value of the input field using $_POST superglobal and then printed the country name using printf() function on the webpage.

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