Check if a POST value is empty

Question

I want to check if the post if filled or not (post variable empty or not) I'm using "isset", and it just does not seem to work, everytime i submit the form it says filled even when the form is not filled.

PHP code :

<?php
      if (isset($_POST["submit"])) {
          echo "filled";
      } else {
          echo "not filled";
      }
?>

HTML code :

<form method="post">
    <input type="text" name="username" /><br><br>
    <input type="submit" name="submit">
</form>

when i printed $_POST, it says :

[username] => [submit] => Submit

@u_mulder yes it works, but i want to do it with isset, this is a simple case, am having a huge form, and i want to check if(isset($_POST["submit"])) — OussamaMater, Jan 18 '20 at 11:27
`$_POST["submit"]` is a button, it is always set as you __press this button__ to submit. — u_mulder, Jan 18 '20 at 11:33
it just does not make anysense i've seen lots of tutos using the same function? even using just $_POST will always give me that its filled — OussamaMater, Jan 18 '20 at 11:35
So this tutos check that someone is trying to __submit__ the form, they not check that form is empty or not filled. — u_mulder, Jan 18 '20 at 11:36
@u_mulder yes i see, i guess i have to check one by one then — OussamaMater, Jan 18 '20 at 11:41

score 0 · Accepted Answer · edited Oct 21 '20 at 10:30

0

Use !empty() instead of isset();

<?php
    if (!empty($_POST["username"]) && !empty($_POST["submit"])) {
        echo "filled";
    } else {
        echo "not filled";
    }

edited Oct 21 '20 at 10:30

Dharman

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answered Jan 18 '20 at 11:36

Rahul Wala

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Check if a POST value is empty

1 Answers1