Caveats

Even though Opis Closure provides a ton of great features, there are some known limitations about which we consider you must be warned of.

Multiple closures per line

Due to PHP’s own limitations, the library is unable to distinguish between two or more closures when they are on the same line.

// This will NOT work!
$first = function() {return "1st";}; $second = function() {return "2nd";};
// This will also NOT work!
$first = fn() => "1st"; $second = fn() => "2nd";
// This will NOT work, either.
$first = fn() => fn() => "2nd";

// This will work!
$first = function() {return "1st";};
$second = function() {return "2nd";};

Multiple anonymous classes per line

// This will not work
$first = new class() extends A {}; $second = new class() extends B {};

In the future, we plan to implement a heuristic to select the appropriate anonymous class. Until then, this should have minimal impact on most codebases.