Tipos de Recurso
Exemplos
Yaml
PHP Manual

# Constantes pré-definidas

As contantes abaixo são definidas por esta extensão e somente estarão disponíveis quando a extensão foi compilada com o PHP ou carregada dinamicamente durante a execução.

Scalar entity styles usable by yaml_parse() callback methods.
`YAML_ANY_SCALAR_STYLE` (integer)
`YAML_PLAIN_SCALAR_STYLE` (integer)
`YAML_SINGLE_QUOTED_SCALAR_STYLE` (integer)
`YAML_DOUBLE_QUOTED_SCALAR_STYLE` (integer)
`YAML_LITERAL_SCALAR_STYLE` (integer)
`YAML_FOLDED_SCALAR_STYLE` (integer)

Common tags usable by yaml_parse() callback methods.
`YAML_NULL_TAG` (string)
  "tag:yaml.org,2002:null"
`YAML_BOOL_TAG` (string)
  "tag:yaml.org,2002:bool"
`YAML_STR_TAG` (string)
  "tag:yaml.org,2002:str"
`YAML_INT_TAG` (string)
  "tag:yaml.org,2002:int"
`YAML_FLOAT_TAG` (string)
  "tag:yaml.org,2002:float"
`YAML_TIMESTAMP_TAG` (string)
  "tag:yaml.org,2002:timestamp"
`YAML_SEQ_TAG` (string)
  "tag:yaml.org,2002:seq"
`YAML_MAP_TAG` (string)
  "tag:yaml.org,2002:map"
`YAML_PHP_TAG` (string)
  "!php/object"

Encoding types for yaml_emit()
`YAML_ANY_ENCODING` (integer)
  Let the emitter choose an encoding.
`YAML_UTF8_ENCODING` (integer)
  Encode as UTF8.
`YAML_UTF16LE_ENCODING` (integer)
  Encode as UTF16LE.
`YAML_UTF16BE_ENCODING` (integer)
  Encode as UTF16BE.

Linebreak types for yaml_emit()
`YAML_ANY_BREAK` (integer)
  Let emitter choose linebreak character.
`YAML_CR_BREAK` (integer)
  Use \r as break character (Mac style).
`YAML_LN_BREAK` (integer)
  Use \n as break character (Unix style).
`YAML_CRLN_BREAK` (integer)
  Use \r\n as break character (DOS style).

Tipos de Recurso
Exemplos
Yaml
PHP Manual