get_defined_constants Returns an associative array with the names of all the constants and their values &reftitle.description; arrayget_defined_constants boolcategorize 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. &reftitle.parameters; categorize 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 ) ) ]]> &reftitle.returnvalues; &reftitle.changelog; &Version; &Description; 5.3.1 Windows only : Core constants are categorized under Core, previously mhash. 5.3.0 Core constants are categorized under Core, previously internal. On Windows, the Core Constants are categorized under mhash. 5.0.0 The categorize parameter was added. &reftitle.examples; <function>get_defined_constants</function> Example ]]> &example.outputs.similar; 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 ) ]]> &reftitle.seealso; defined get_loaded_extensions get_defined_functions get_defined_vars