PHP SuperClosure v2.0-alpha1

SuperClosure is getting an overhaul!

Changelog

• There are are now 2 parses supported
  • AST Parser – Implemented with the nikic/PHPParser library. This parser is the most robust and allows you to
    resolve magic constants and fully-qualified class names in your closure. This is the default parser.
  • Token Parser – Implemented using the code from the old jeremeamia/FunctionParser library. This library was
    used in a previous version of SuperClosure, and has been ported back in. While it does not handle all edge cases
    like resolving magic constants, it is MUCH faster (at least an order of magnitude).
• You can now serialize closure bindings – If you are using closures in PHP 5.4+, closures are bound to an object and
  scope such that you can reference $this inside of a closure. Unserialized closures from version 1 of SuperClosure
  needed to be rebound to an object manually to prevent failure in functions containing $this, but this version can
  handle bindings just fine.
• The ability to turn features on and off – Closure parser objects accept an array of options that can allow you to
  configure the capability vs. performance of your closure serialization. If you don't want to serialize closure
  bindings or resolve magic constants, you can turn those features off.
  • Along with this is a option called turbo_mode that turns all the non-essential features off, This will make
    closure serialization much faster, but is the least robust at handling edge cases.
• The easy serialize_closure() function – If you have installed SuperClosure via Composer, then the
  serialize_closure() function will automagically be available. This allows you to easily serialize the closure with
  out have to import/use any of the classes from the library directly. This function also allows you to specify the
  options for the parser.
• The package is now PSR-4 compliant. As soon as TravisCI is ready and Jordi (Composer author) gives the PHP world the
  green light, I'll remove the provided autoload.php in favor of Composer's PSR-4 support.

Is everything different and broken?

It depends. Mostly no.

If you were just using the SerializableClosure object, then it should work exactly the same way as before.

$closure = new SerializableClosure($closure);
$serialized = serialize($closure);

If you were relying directly on the ClosureParser object, then you will have breaking changes for sure. They likely will not be difficult to fix though since SuperClosure is still a small library. Just keep in mind that there is now more than one type of parser available.

Examples

// ROBUST MODE (i.e., SLOW MODE) (Uses the AST parser with all features on)
$serialized = serialize_closure($closure);

// TURBO MODE (Uses the token parser, with all features off)
$serialized = serialize_closure($closure, array(SC_TURBO_MODE => true));

// The rest are examples of mixing and matching features
//-------------------------------------------------------

// Does everything else, but ignores closure bindings
// This is perfect for functions in PHP 5.4+ that are declared in a class, but do not reference `$this`
$serialized = serialize_closure($closure, array(
    SC_HANDLE_CLOSURE_BINDINGS => false,
));

// Uses the Token parser explicitly
$serialized = serialize_closure($closure, array(
    SC_PARSER_CLASS => SC_PARSER_TOKEN,
));

// Uses the Token parser implicitly, by disabling the features unique to the AST parser
$serialized = serialize_closure($closure, array(
    SC_HANDLE_MAGIC_CONSTANTS => false,
    SC_HANDLE_CLASS_NAMES     => false,
));

// This is equivalent to TURBO MODE. ZOOOOOOM!!!
$serialized = serialize_closure($closure, array(
    SC_PARSER_CLASS    => SC_PARSER_TOKEN,
    SC_VALIDATE_TOKENS => false,
));

TODO

• Unit Tests - I removed all of the previous unit tests due to the extreme changes. However, I currently have a
  suite of integration tests that exercise the code nicely and show how it handles different scenarios.
• Collect Feedback - I've made a lot of changes. I'd love to hear what you think. Do you like the changes? Do the
  config settings make sense? Do the config defaults work well? Let me know if you have any suggestions,
  feedback, ideas, complaints, etc.