How to set PHP variable to a default string if the POST content is empty?

Asked Jun 16 '22 at 19:07

Active Jun 16 '22 at 19:07

Viewed 33 times

I have the following:

<?php

    $one = "hello";

    if(isset($_POST['one'])){
        $one = $_POST['one'];
    }

?>

The issue is I have a bunch of variables in the same format as this - is there a shorter way to default a variable to a value if the $_POST does not exist? Perhaps a one-liner?

Note, it does not matter if the $_POST['var'] variable is empty or not, just if it exists

asked Jun 16 '22 at 19:07

jefiwo

3

`$one = $_POST['one'] ?? 'hello';` [Null Coalescing Operator](https://www.php.net/manual/en/language.operators.comparison.php) – Markus Zeller Jun 16 '22 at 19:13
@MarkusZeller Doesn't work unfortunately, it sets the `$one` variable to `` (empty), even though `$_POST['one']` wasn't passed into the POST header – jefiwo Jun 16 '22 at 19:15
This will work. Read the linked documentation and scroll down to Null Coalescing Operator for an example. – Markus Zeller Jun 16 '22 at 19:19
1

`var_dump($_POST['one'])` gives back what? – user3783243 Jun 16 '22 at 19:24
1

Merge `$_POST` array with array of predefined values. – u_mulder Jun 16 '22 at 19:26
3

if it sets the $one variable to empty string, then, logically speaking, $_POST['one'] **was** passed. – Your Common Sense Jun 16 '22 at 19:43

How to set PHP variable to a default string if the POST content is empty?

0 Answers0