One Liner

A one-liner refers to a concise and often single expression that accomplishes a specific task. It’s a shorthand way of expressing functionality in a compact form.

One liner are supposed to fit on one line. The line is also supposed to be limited in size.

One liners tends to pack a lot of operations in one expression. When used aggressively, one liners become less readable, and more complex.

Some commands have a short and a long syntax, such as if-then-else and the ternary operator condition ? then : else.

<?php

// one-liner
$condition ? doSomething() : doSomethingElse();

// equivalent to above, not a one liner
if ($condition) {
     doSomething();
} else {
     doSomethingElse();
}

?>

See also https://localheinz.com/articles/2023/03/18/avoiding-one-liners-in-php/, https://tanzilr.medium.com/decontructing-php-one-liner-webshells-625f6cbb96ff

Related : Webshell, Golf