Why is it not advisable to cram such complex logic into a single line of code in PHP?

It is not advisable to cram complex logic into a single line of code in PHP because it can make the code difficult to read, maintain, and debug. Breaking down complex logic into multiple lines improves code readability and makes it easier to understand for other developers. It also allows for better error handling and testing.

// Complex logic broken down into multiple lines for better readability and maintainability
$variable1 = someFunction();
$variable2 = anotherFunction($variable1);
$result = finalFunction($variable2);
return $result;