A brief introduction to the Standard PHP Library's new objects and programming designs

2. Who Are You and Why Are You In My House? Chris Tankersley Been doing PHP for almost 8 years now Lots of projects no one uses released under the BSD license Contributer to the Habari Project

4. Iterators, ArrayObjects, Exceptions, Observer/Subject Pattern

5. Added to PHP in 5.0

6. 5.3 has it mandatory

7. Arrays

8. Doesn't PHP Have Arrays? Yes! $array = new array ( 'scalar' , 'data' => 'this!' ); $array2 = new array (); $array2 [ 'key' ] = 'value' ; $array2 [] = 'newvalue' ]; Now you can make Objects work like Arrays $object = new MyArrayObject (); $object [] = 'newvalue' ; echo $object [ 'mykey' ];

10. On-par with Arrays in Performance

11. Add business logic to Arrays class NumericContainer implements ArrayAccess { protected $container = array (); public function offsetSet ( $offset , $value ) { if (! is_numeric ( $value ) { throw new Exception ( 'Value must be numeric!' ); } $this ->container[ $offset ] = $value ; } }

13. Extend ArrayObject

14. Fixed Arrays

16. Keys must be integers

18. Lists, Stacks and Queues (Oh My)

19. SplDoublyLinkedList At first glance, why? $list = new SplDoublyLinkedList (); $list -> push ( 1 ); $list -> push ( 2 ); $list -> push ( 3 ); foreach ( $list as $key => $value ) { echo $key . ': ' . $value ; } $array = array (); $array [] = 1 ; $array [] = 2 ; $array [] = 3 ; foreach ( $array as $key => $value ) { echo $key . ': ' . $value ; }

21. Can run as a Queue (FIFO)

22. Can keep elements over iteration

23. Can delete elements over iteration

25. Enforces LIFO

27. Enforces FIFO

28. But, it's slow [chris@paladine spl]$ php array .php Completed in 3.4125499725342 seconds [chris@paladine spl]$ php arrayobject.php Completed in 3.4321970939636 seconds [chris@paladine spl]$ php fixedarray.php Completed in 2.9916169643402 seconds [chris@paladine spl]$ php ll.php Completed in 6.5478150844574 seconds [chris@paladine spl]$ php stack.php Completed in 6.553768157959 seconds [chris@paladine spl]$ php queue.php Completed in 6.6605279445648 seconds

29. Heaps, Big and Small

31. Always have access to the valid element only http://commons.wikimedia.org/wiki/File:Max-heap.png

35. Priority Queues

37. Useful when order needs to be enforced based on some external condition

38. <?php class CronHandler { protected $queue ; public class __construct () { $this ->queue = new SplPriorityQueue (); } public class addJob (Cron_Job $job ) { $this ->queue-> insert ( $job , $job ->priority); } public class run () { foreach ( $this ->queue as $job ) { $job -> run (); } } }

39. Maps and Sets

41. Can be used as a Set or a Map

42. The Object is the thing that matters, not the data

43. Can use either Object or Array notation

44. SplObjectStorage as a Set $set = new SplObjectStorage (); $o1 = new StdClass (); $o2 = new StdClass (); $o3 = new StdClass (); $set -> attach ( $o1 ); $set -> attach ( $o2 ); $set -> attach ( $o3 );

45. SplObjectStorage as a Map $set = new SplObjectStorage (); $o1 = new StdClass (); $o2 = new StdClass (); $o3 = new StdClass (); $set -> attach ( $o1 , array ( 1 , 2 , 3 )); $set -> attach ( $o2 , array ( 4 , 5 , 6 )); $set -> attach ( $o3 , array ( 7 , 8 , 9 ));

47. Iterators!

49. ArrayIterator — The ArrayIterator class

50. CachingIterator — The CachingIterator class

51. DirectoryIterator — The DirectoryIterator class

52. EmptyIterator — The EmptyIterator class

53. FilesystemIterator — The FilesystemIterator class

54. FilterIterator — The FilterIterator class

55. GlobIterator — The GlobIterator class

56. InfiniteIterator — The InfiniteIterator class

57. IteratorIterator — The IteratorIterator class

58. LimitIterator — The LimitIterator class

59. MultipleIterator — The MultipleIterator class

60. NoRewindIterator — The NoRewindIterator class

61. ParentIterator — The ParentIterator class

62. RecursiveArrayIterator — The RecursiveArrayIterator class

63. RecursiveCachingIterator — The RecursiveCachingIterator class

64. RecursiveDirectoryIterator — The RecursiveDirectoryIterator class

65. RecursiveFilterIterator — The RecursiveFilterIterator class

66. RecursiveIteratorIterator — The RecursiveIteratorIterator class

67. RecursiveRegexIterator — The RecursiveRegexIterator class

68. RecursiveTreeIterator — The RecursiveTreeIterator class

69. RegexIterator — The RegexIterator class

70. SimpleXMLIterator — The SimpleXMLIterator class

71. New Exceptions

74. Built-In Observer Pattern

76. Subjects can attach Observers and then notify them

77. Very basic implementation

78. Working with Files

80. SplTempFileObject for Temporary Files

81. Can get File Info from a file

82. Makes your life easier $file = new SplFileObject ( &quot;myfile.txt&quot; ); foreach ( $file as $line ) { echo $line ; }

83. Questions?

85. Matthew Weier O'Phinney