strlen() was used in Phabricator to check if a generic value is a non-empty string.
This behavior is deprecated since PHP 8.1. Phorge adopts phutil_nonempty_string() as a replacement.
Note: this may highlight other absurd input values that might be worth correcting
instead of just ignoring. If phutil_nonempty_string() throws an exception in your
instance, report it to Phorge to evaluate and fix that specific corner case.
array_slice() no longer accepts passing null as a parameter.
This behavior is deprecated since PHP 8.1. Adding an if clause; not using a
Null Coalescing Operator (PHP 7+) as Phorge currently still supports PHP 5.5.
Closes T15321
