I have a form and I'm doing input validation, so when the user inputs something wrong I generate an error message and refill all the fields the user entered.
Now, some errors popped up when I started using the php.ini file for mysql stuff, such as
Undefined index: var in file.php on line n
For a simple text input (a title) I was able to fix this fairly easily, by doing
value="<?= isset($_POST["title"]) ? $_POST["title"] : "";?>"
However, I'm also using 5 radio buttons to give a rating, like this:
value="1" <?= $_POST["grade"] == "1" ? "checked" : "" ?>
value="2" <?= $_POST["grade"] == "2" ? "checked" : "" ?>
etc
I tried applying the isset bandage here as well,
value="1" <?= isset($_POST["grade"] == "1") ? "checked" : "" ?>
but as I was quickly reminded, isset only works with variables and arrays, not booleans.
What would be an appropriate way to solve this?
The first thing you have to do is check whether the variable is set or not. Then you can append your comparison with an operator.
value="1" <?= isset($_POST["grade"]) && $_POST["grade"] == "1" ? "checked" : "" ?>