get_defined_constants
Returns an associative array with the names of all the constants
and their values
Description
arrayget_defined_constants
mixedcategorize
This function returns the names and values of all the constants
currently defined. This includes those created by extensions as
well as those created with the define
function.
For example the line below:
]]>
will print a list like:
1
[E_WARNING] => 2
[E_PARSE] => 4
[E_NOTICE] => 8
[E_CORE_ERROR] => 16
[E_CORE_WARNING] => 32
[E_COMPILE_ERROR] => 64
[E_COMPILE_WARNING] => 128
[E_USER_ERROR] => 256
[E_USER_WARNING] => 512
[E_USER_NOTICE] => 1024
[E_ALL] => 2047
[TRUE] => 1
)
]]>
As of PHP 5, an additional parameter, categorize,
may be passed, causing this function to return a multi-dimensional array
with categories in the keys of the first dimension and
constants and their values in the second dimension.
]]>
&example.outputs.similar;
Array
(
[E_ERROR] => 1
[E_WARNING] => 2
[E_PARSE] => 4
[E_NOTICE] => 8
[E_CORE_ERROR] => 16
[E_CORE_WARNING] => 32
[E_COMPILE_ERROR] => 64
[E_COMPILE_WARNING] => 128
[E_USER_ERROR] => 256
[E_USER_WARNING] => 512
[E_USER_NOTICE] => 1024
[E_ALL] => 2047
[TRUE] => 1
)
[pcre] => Array
(
[PREG_PATTERN_ORDER] => 1
[PREG_SET_ORDER] => 2
[PREG_OFFSET_CAPTURE] => 256
[PREG_SPLIT_NO_EMPTY] => 1
[PREG_SPLIT_DELIM_CAPTURE] => 2
[PREG_SPLIT_OFFSET_CAPTURE] => 4
[PREG_GREP_INVERT] => 1
)
[user] => Array
(
[MY_CONSTANT] => 1
)
)
]]>
The value of the categorize parameter is irrelevant,
only its presence is considered.
See also
defined,
get_loaded_extensions,
get_defined_functions, and
get_defined_vars.