The "Unknown:"s below indicate that an entry is incomplete.

• either the entry exist in the language, and please tell.
• either the entry doesn't exist in the language, and please tell so. The entry will be marked as such and won't appear as missing anymore.

See the various entries for PHP

• Category: Object Oriented, Dynamically typed

• Various

  min / max	comparison (min / max (binary or more))
  == !=	equality / inequality (deep)
  === !==	equality / inequality (shallow)
  gc_collect_cycles(1)	force garbage collection

  Unknown:

  tokens (what is the standard way for scrunching together multiple words)

• Functions

  function(a, b) { ... }	anonymous function
  function(a, b) use (&$v1, $v2) { ... }(2)	anonymous function
  __autoload	function called when a function is not defined (in dynamic languages)
  function f(para1, para2) { ... }	function definition
  debug_backtrace	runtime inspecting the caller information

• Control Flow

  goto	breaking control flow (goto (unconditional jump))
  try { ... } catch(t $v) { ... }	exception (catching)
  throw	exception (throwing)

  Unknown:

  loop (forever loop)
  loop (do something until condition)

• Object Oriented & Reflexivity

  parent::method	accessing parent method
  method_exists	has the method
  class child extends parent	inheritance
  __destruct	manually call an object's destructor
  object->method()	method invocation (with no parameter)
  clone $o	object cloning
  instanceof	testing class membership

• Package, Module

  namespace P;	declare
  use P1\P;	import (everything into current namespace)
  use P1\P as Q;	import (everything into current namespace)

  Unknown:

  package scope

• Strings

  <<<'MARK' ... MARK(3)

  strings (with no interpolation of variables)

• Bags and Lists

  array_filter	keep elements (matching)
  [ a, b, c ](4)	list constructor
  min / max	smallest / biggest element

  Unknown:

  list flattening
  adding an element at index
  first element
  all but the first element
  last element

• Various Data Types

  Unknown:

  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (empty tuple)
  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (1-uple)
  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (using a tuple for a function call)
  reference (pointer) (creation)
  reference (pointer) (dereference)
  optional value (null value)
  optional value (value)
  record (selector)

• Mathematics

  0b1, 07, 0xf(5)

  numbers syntax (integers in base 2, octal and hexadecimal)

  Unknown:

  trigonometry (inverse)

Remarks

• (1) starting with PHP 5.3
• (2) manual declaration of local variables wanted in the closure
• (3) since PHP 5.3
• (4) new in PHP 5.4
• (5) 0b1 new in PHP 5.4