spyc.yaml loaded into PHP:
Array
(
    [String] => Anyone's name, really.
    [Int] => 13
    [BadHex] => f0xf3
    [Hex] => 243
    [True] => 1
    [False] => 
    [Zero] => 0
    [Null] => 
    [NotNull] => null
    [NotTrue] => y
    [NotBoolTrue] => true
    [NotInt] => 5
    [Float] => 5.34
    [Negative] => -90
    [SmallFloat] => 0.7
    [NewLine] => \n
    [QuotedNewLine] => 
    [0] => PHP Class
    [1] => Basic YAML Loader
    [2] => Very Basic YAML Dumper
    [3] => Array
        (
            [0] => YAML is so easy to learn.
            [1] => Your config files will never be the same.
        )
    [4] => Array
        (
            [cpu] => 1.5ghz
            [ram] => 1 gig
            [os] => os x 10.4.1
        )
    [domains] => Array
        (
            [0] => yaml.org
            [1] => php.net
        )
    [5] => Array
        (
            [program] => Adium
            [platform] => OS X
            [type] => Chat Client
        )
    [no time] => There isn't any time for your tricks!
Do you understand?
    [some time] => There is nothing but time
for your tricks.
    [databases] => Array
        (
            [0] => Array
                (
                    [name] => spartan
                    [notes] => Array
                        (
                            [0] => Needs to be backed up
                            [1] => Needs to be normalized
                        )
                    [type] => mysql
                )
        )
    [if: you'd] => like
    [6] => Array
        (
            [0] => One
            [1] => Two
            [2] => Three
            [3] => Four
        )
    [7] => Array
        (
            [0] => One
            [1] => Array
                (
                    [0] => Two
                    [1] => And
                    [2] => Three
                )
            [2] => Four
            [3] => Five
        )
    [8] => Array
        (
            [0] => This
            [1] => Array
                (
                    [0] => Is
                    [1] => Getting
                    [2] => Array
                        (
                            [0] => Ridiculous
                            [1] => Guys
                        )
                )
            [2] => Seriously
            [3] => Array
                (
                    [0] => Show
                    [1] => Mercy
                )
        )
    [9] => Array
        (
            [name] => chris
            [age] => young
            [brand] => lucky strike
        )
    [10] => Array
        (
            [name] => mark
            [age] => older than chris
            [brand] => Array
                (
                    [0] => marlboro
                    [1] => lucky strike
                )
        )
    [dynamic languages] => Array
        (
            [0] => Perl
            [1] => Python
            [2] => PHP
            [3] => Ruby
        )
    [compiled languages] => Array
        (
            [0] => C/C++
            [1] => Java
        )
    [all languages] => Array
        (
            [0] => Array
                (
                    [0] => Perl
                    [1] => Python
                    [2] => PHP
                    [3] => Ruby
                )
            [1] => Array
                (
                    [0] => C/C++
                    [1] => Java
                )
        )
    [11] => you know, this shouldn't work.  but it does.
    [12] => that's my value.
    [13] => again, that's my value.
    [14] => here's to "quotes", boss.
    [15] => Array
        (
            [name] => Foo, Bar's
            [age] => 20
        )
    [16] => Array
        (
            [0] => a
            [1] => Array
                (
                    [0] => 1
                    [1] => 2
                )
            [2] => b
        )
    [17] => First line
Second line
Third line
    [18] => Array
        (
            [javascripts] => Array
                (
                    [0] => dom1.js
                    [1] => dom.js
                )
        )
    [1040] => Ooo, a numeric key!
    [hash_1] => Hash
    [hash_2] => Hash #and a comment
    [hash#3] => Hash (#) can appear in key too
    [float_test] => 1.0
    [float_test_with_quotes] => 1.0
    [float_inverse_test] => 1
    [a_really_large_number] => 115792089237316195423570985008687907853269984665640564039457584007913129639936
    [int array] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
        )
    [array on several lines] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 2
            [3] => 3
            [4] => 4
            [5] => 5
            [6] => 6
            [7] => 7
            [8] => 8
            [9] => 9
            [10] => 10
            [11] => 11
            [12] => 12
            [13] => 13
            [14] => 14
            [15] => 15
            [16] => 16
            [17] => 17
            [18] => 18
            [19] => 19
        )
    [morelesskey] => 
    [array_of_zero] => Array
        (
            [0] => 0
        )
    [sophisticated_array_of_zero] => Array
        (
            [rx] => Array
                (
                    [tx] => Array
                        (
                            [0] => 0
                        )
                )
        )
    [switches] => Array
        (
            [0] => Array
                (
                    [row] => 0
                    [col] => 0
                    [func] => Array
                        (
                            [tx] => Array
                                (
                                    [0] => 0
                                    [1] => 1
                                )
                        )
                )
        )
    [empty_sequence] => Array
        (
        )
    [empty_hash] => Array
        (
        )
    [special_characters] => [{]]{{]]
    [asterisks] => *
    [empty_key] => Array
        (
            [] => Array
                (
                    [key] => value
                )
        )
    [trailing_colon] => foo:
    [multiline_items] => Array
        (
            [0] => Array
                (
                    [type] => SomeItem
                    [values] => Array
                        (
                            [0] => blah
                            [1] => blah
                            [2] => blah
                            [3] => blah
                        )
                    [ints] => Array
                        (
                            [0] => 2
                            [1] => 54
                            [2] => 12
                            [3] => 2143
                        )
                )
        )
    [many_lines] => A quick
fox
jumped
over
a lazy
dog
    [werte] => Array
        (
            [1] => nummer 1
            [0] => Stunde 0
        )
    [noindent_records] => 
    [1041] => Array
        (
            [record1] => value1
        )
    [1042] => Array
        (
            [record2] => value2
        )
    [a:1] => Array
        (
            [0] => 1000
        )
    [a:2] => Array
        (
            [0] => 2000
        )
    [a:3] => Array
        (
            [0] => 3000
        )
    [complex_unquoted_key] => Array
        (
            [a:b:''test'] => value
        )
    [array with commas] => Array
        (
            [0] => 0
            [1] => 1
        )
    [invoice] => Array
        (
            [0] => Something
            [1] => 
            [2] => 
            [3] => Something else
        )
    [quotes] => Array
        (
            [0] => Something
            [1] => Nothing
            [2] => Anything
            [3] => Thing
        )
    [endloop] => Does this line in the end indeed make Spyc go to an infinite loop?
)
YAML Data dumped back:
---
String: "Anyone's name, really."
Int: 13
BadHex: f0xf3
Hex: 243
True: true
False: false
Zero: 0
Null: null
NotNull: 'null'
NotTrue: 'y'
NotBoolTrue: 'true'
NotInt: "5"
Float: 5.34
Negative: -90
SmallFloat: 0.7
NewLine: \n
QuotedNewLine: \n
0: PHP Class
1: Basic YAML Loader
2: Very Basic YAML Dumper
3:
  - YAML is so easy to learn.
  - >
    Your config files will never be the
    same.
4:
  cpu: 1.5ghz
  ram: 1 gig
  os: os x 10.4.1
domains:
  - yaml.org
  - php.net
5:
  program: Adium
  platform: OS X
  type: Chat Client
no time: |
  There isn't any time for your tricks!
  Do you understand?
some time: |
  There is nothing but time
  for your tricks.
databases:
  - 
    name: spartan
    notes:
      - Needs to be backed up
      - Needs to be normalized
    type: mysql
"if: you'd": like
6:
  - One
  - Two
  - Three
  - Four
7:
  - One
  - 
    - Two
    - And
    - Three
  - Four
  - Five
8:
  - This
  - 
    - Is
    - Getting
    - 
      - Ridiculous
      - Guys
  - Seriously
  - 
    - Show
    - Mercy
9:
  name: chris
  age: young
  brand: lucky strike
10:
  name: mark
  age: older than chris
  brand:
    - marlboro
    - lucky strike
dynamic languages:
  - Perl
  - Python
  - PHP
  - Ruby
compiled languages:
  - C/C++
  - Java
all languages:
  - 
    - Perl
    - Python
    - PHP
    - Ruby
  - 
    - C/C++
    - Java
11: "you know, this shouldn't work.  but it does."
12: "that's my value."
13: "again, that's my value."
14: |
  here's to "quotes", boss.
15:
  name: "Foo, Bar's"
  age: 20
16:
  - a
  - 
    - "1"
    - "2"
  - b
17: |
  First line
  Second line
  Third line
18:
  javascripts:
    - dom1.js
    - dom.js
1040: Ooo, a numeric key!
hash_1: Hash
hash_2: 'Hash #and a comment'
"hash#3": 'Hash (#) can appear in key too'
float_test: "1.0"
float_test_with_quotes: "1.0"
float_inverse_test: 1
a_really_large_number: >
  115792089237316195423570985008687907853269984665640564039457584007913129639936
int array:
  - 1
  - 2
  - 3
array on several lines:
  - 0
  - 1
  - 2
  - 3
  - 4
  - 5
  - 6
  - 7
  - 8
  - 9
  - 10
  - 11
  - 12
  - 13
  - 14
  - 15
  - 16
  - 17
  - 18
  - 19
morelesskey: ''
array_of_zero:
  - 0
sophisticated_array_of_zero:
  rx:
    tx:
      - 0
switches:
  - 
    row: 0
    col: 0
    func:
      tx:
        - 0
        - 1
empty_sequence: [ ]
empty_hash: [ ]
special_characters: '[{]]{{]]'
asterisks: '*'
empty_key:
  :
    key: value
trailing_colon: 'foo:'
multiline_items:
  - 
    type: SomeItem
    values:
      - blah
      - blah
      - blah
      - blah
    ints:
      - 2
      - 54
      - 12
      - 2143
many_lines: |
  A quick
  fox
  
  
  jumped
  over
  
  
  
  
  
  a lazy
  
  
  
  dog
werte:
  1: nummer 1
  0: Stunde 0
noindent_records: ""
1041:
  record1: value1
1042:
  record2: value2
"a:1":
  - 1000
"a:2":
  - 2000
"a:3":
  - 3000
complex_unquoted_key:
  "a:b:''test'": value
array with commas:
  - "0"
  - "1"
invoice:
  - Something
  - ""
  - ""
  - Something else
quotes:
  - Something
  - Nothing
  - Anything
  - Thing
endloop: >
  Does this line in the end indeed make
  Spyc go to an infinite loop?