PHP fixing undefined error with echo instead? But does not work

Question

I am inserting and updating some values through a form with radioboxes and textarea. Basically the query works fine but if user does not select any radio boxes or leaves the text area empty, I want an error message to pop up, instead of real php errors of undefined.... blah blah.

Sorry for this weird layout, but this text editor is super problematic with editing..

    $var1 = $_POST['var_1'];
    $var2 = $_POST['var_2'];
    $var3 = $_POST['var_3'];
    

    if(isset($_POST['button_name'])) {
    
    if(query1 && query2) {
      echo "Successfully inserted and updated"</h3>";
    } elseif(empty($var1) && empty($var2) && empty($var3)) {
      echo "not selected. Please Try Again"</h3>";
    } else {
      echo "failed to sent cause of query issue";
    }
} else {
    echo "nothing was selected";
}

Wais Kamal · Answer 1 · 2021-02-10T17:33:31.203

1

First check if the variables are defined, then set them to their values:

$var1, $var2, $var3;

if(issset($_POST['var_1']) && isset($_POST['var_2']) && isset($_POST['var_3']) && isset($_POST['button_name'])) {
  $var1 = $_POST['var_1'];
  $var2 = $_POST['var_2'];
  $var3 = $_POST['var_3'];
} else {
  echo "Your custom error message";
}

Alternatively, you can use try and catch:

try {
  $var1 = $_POST['var_1'];
  $var2 = $_POST['var_2'];
  $var3 = $_POST['var_3'];
  $_POST['button_name'];
} catch {
  echo "Your custom error message";
}

edited Feb 10 '21 at 17:33

answered Feb 10 '21 at 17:31

Wais Kamal

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What about the button? – mikey1091 Feb 10 '21 at 17:32
You can do it in the same way. – Wais Kamal Feb 10 '21 at 17:35
Thank you so much! It worked. – mikey1091 Feb 10 '21 at 17:43
Glad to help! Consider marking the answer as accepted. – Wais Kamal Feb 10 '21 at 17:45
I tried to but users are lowering my score, not sure what their problems are with my question. – mikey1091 Feb 10 '21 at 17:50
1

Probably you didn't perform a thorough search on your problem before asking. – Wais Kamal Feb 10 '21 at 17:51
That's my problem if I didn't, not theirs. But anyway huge thank you! – mikey1091 Feb 10 '21 at 17:52
Just make sure next time you do some research. Stack Overflow discourages such behaviour. – Wais Kamal Feb 10 '21 at 17:54
Will do. Thank you – mikey1091 Feb 10 '21 at 17:55

PHP fixing undefined error with echo instead? But does not work

1 Answers1