PHP $_POST error Please Help me I am learning PHP

Question

I am learning PHP. Here is the source code.

<?php
$text = $_POST['text'];

echo $text;
?>

<form action="index.php" method="post">
<input type="text" name="text" />
    <input type="submit">
</form>

Here is the result. I don't know where is the problem.

Notice: Undefined index: text in C:\xampp\htdocs\faisal\index.php on line 2

Answer 1

It means there's nothing in $_POST['text'] -- and there won't be, until after the form is submitted. You need to use isset() to check:

<?php
if(isset($_POST['text'])) {
    $text = $_POST['text'];

    echo $text;
}
?>

<form action="index.php" method="post">
<input type="text" name="text" />
    <input type="submit">
</form>