php - When I try to echo a posted string, the output is a boolean -


i trying better php skills , when post last name & first name, echo outputs 1 1. no matter put, echo 1 1. why code doing this?

<?php     error_reporting(e_all); ini_set('display_errors', '1');     if (isset($_post['firstname'])&& isset($_post['lastname'])){         $firstname=isset($_post['firstname']);         $lastname=isset($_post['lastname']);         echo $lastname;         echo $firstname;     } ?>  <!doctype html> <html>     <head>         <meta charset="utf-8">         <title>untitled document</title>     </head>      <body>         <form action="practice2.php" method="post" name="user" >             please enter first name: <br>             <input type="text" name= "firstname"id="firstname">             <br>             please enter last name: <br>             <input type="text" name="lastname" id="lastname">              <input type="submit" name="submit">          </form>     </body> </html>

the isset method returns boolean, when printed, results in showing 1. want is:

if (isset($_post['firstname'])&& isset($_post['lastname'])){     $firstname = $_post['firstname'];     $lastname  = $_post['lastname'];      echo $lastname;     echo $firstname; }

you've checked if set in if statement, there's no reason check again within it.

you can see behavior of original code more trying

# output "1". isset returning "true" in original example echo true;

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