very simple program, but I get error in it

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I am getting error in this very simple program

HTML

<form action ="index.php" method="GET">

Name:<br> <input type="text" name="name"><br>
    Age:<br> <input type="text" name="age" size="5"><br><br>
   <input type="submit" value="submit">
</form>

<?php
$name = $_GET['name'];
$age = $_GET['age'];
echo 'I am '.$name.'and I am '.$age;
?>

I get this error

The form gets displayed. But underneath I see this error

Notice: Undefined index: name in C:\xampp\htdocs\start\another.php on line 11

Notice: Undefined index: age in C:\xampp\htdocs\start\another.php on line 12

Posted 18-Nov-15 8:52am

ankur1163

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Sergey Alexandrovich Kryukov 18-Nov-15 14:59pm

If "index.php" the same file as the one you show here?
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-11-18T09:09:00

First of all, it's not clear why you use method="GET" and $_GET; by your semantic, it should rather be method="POST" and $_POST.
But this is not a problem. The problem is different.

Please see my comment to the question. It looks like you show fragment of one single file. If this file was not "index.php", it would not work at all. But if it, it would not work when the page is just loaded. At this moment, the HTTP request with name and age is not yet sent, so the indices are not yet defined. When you submit the form, the HTTP request will come with these two indices, so your script will receive them as values by defined indices.

The simplest thing you can do is the check-up of the index in $_GET or $_POST. This is one of the ways to do so: http://php.net/manual/en/function.array-key-exists.php[^].

—SA