get_defined_constants
(PHP 4 >= 4.0.7, PHP 5)
get_defined_constants — Returns an associative array with the names of all the constants and their values
Popis
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.
Parametre
- 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.
<?php
define("MY_CONSTANT", 1);
print_r(get_defined_constants(true));
?>Výstup horeuvedeného príkladu bude niečo podobné tomuto:
Array ( [internal] => 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 ) )
Note: The value of the categorize parameter is irrelevant, only its presence is considered.
Vrátené hodnoty
ChangeLog
Verzia | Popis |
---|---|
5.0.0 | The categorize parameter was added. |
Príklady
Example#1 get_defined_constants() Example
<?php
print_r(get_defined_constants());
?>
Výstup horeuvedeného príkladu bude niečo podobné tomuto:
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 )