PHP Undefined Array Key Handling
<?php
if (isset($_POST['uname'])) {
$a = isset($_POST['uname'];
}
else
$a = null;
?>
Or
<?php
$a = isset($_POST['uname']) ? $_POST['uname'] : null;
?>
<?php
if (isset($_POST['uname'])) {
$a = isset($_POST['uname'];
}
else
$a = null;
?>
Or
<?php
$a = isset($_POST['uname']) ? $_POST['uname'] : null;
?>