update xml_*_handler signature

Author: VincentLanglet

resources/functionMap.php

@@ -11717,16 +11717,16 @@
 'xml_parser_free' => ['bool', 'parser'=>'resource'],
 'xml_parser_get_option' => ['mixed', 'parser'=>'resource', 'option'=>'int'],
 'xml_parser_set_option' => ['bool', 'parser'=>'resource', 'option'=>'int', 'value'=>'mixed'],
-'xml_set_character_data_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_default_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_element_handler' => ['bool', 'parser'=>'resource', 'shdl'=>'callable', 'ehdl'=>'callable'],
-'xml_set_end_namespace_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_external_entity_ref_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_notation_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
+'xml_set_character_data_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_default_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_element_handler' => ['bool', 'parser'=>'resource', 'shdl'=>'callable|string|null', 'ehdl'=>'callable|string|null'],
+'xml_set_end_namespace_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_external_entity_ref_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_notation_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
 'xml_set_object' => ['bool', 'parser'=>'resource', 'obj'=>'object'],
-'xml_set_processing_instruction_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_start_namespace_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
-'xml_set_unparsed_entity_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable'],
+'xml_set_processing_instruction_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_start_namespace_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
+'xml_set_unparsed_entity_decl_handler' => ['bool', 'parser'=>'resource', 'hdl'=>'callable|string|null'],
 'XMLDiff\Base::__construct' => ['void', 'nsname'=>'string'],
 'XMLDiff\Base::diff' => ['mixed', 'from'=>'mixed', 'to'=>'mixed'],
 'XMLDiff\Base::merge' => ['mixed', 'src'=>'mixed', 'diff'=>'mixed'],