diff -up php-5.5.7RC1/ext/reflection/php_reflection.c.prev php-5.5.7RC1/ext/reflection/php_reflection.c
--- php-5.5.7RC1/ext/reflection/php_reflection.c.prev	2013-12-02 14:32:21.349858888 +0100
+++ php-5.5.7RC1/ext/reflection/php_reflection.c	2013-12-02 15:11:13.073610775 +0100
@@ -1105,29 +1105,26 @@ static void _extension_string(string *st
 		string_free(&str_constants);
 	}
 
-	if (module->functions && module->functions->fname) {
+	{
+		HashPosition iterator;
 		zend_function *fptr;
-		const zend_function_entry *func = module->functions;
-
-		string_printf(str, "\n  - Functions {\n");
+		int first = 1;
 
-		/* Is there a better way of doing this? */
-		while (func->fname) {
-			int fname_len = strlen(func->fname);
-			char *lc_name = zend_str_tolower_dup(func->fname, fname_len);
-		
-			if (zend_hash_find(EG(function_table), lc_name, fname_len + 1, (void**) &fptr) == FAILURE) {
-				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Internal error: Cannot find extension function %s in global function table", func->fname);
-				func++;
-				efree(lc_name);
-				continue;
+		zend_hash_internal_pointer_reset_ex(CG(function_table), &iterator);
+		while (zend_hash_get_current_data_ex(CG(function_table), (void **) &fptr, &iterator) == SUCCESS) {
+			if (fptr->common.type==ZEND_INTERNAL_FUNCTION
+				&& fptr->internal_function.module == module) {
+				if (first) {
+					string_printf(str, "\n  - Functions {\n");
+					first = 0;
+				}
+				_function_string(str, fptr, NULL, "    " TSRMLS_CC);
 			}
-
-			_function_string(str, fptr, NULL, "    " TSRMLS_CC);
-			efree(lc_name);
-			func++;
+			zend_hash_move_forward_ex(CG(function_table), &iterator);
+		}
+		if (!first) {
+			string_printf(str, "%s  }\n", indent);
 		}
-		string_printf(str, "%s  }\n", indent);
 	}
 
 	{
@@ -5264,6 +5261,9 @@ ZEND_METHOD(reflection_extension, getFun
 {
 	reflection_object *intern;
 	zend_module_entry *module;
+	HashPosition iterator;
+	zval *function;
+	zend_function *fptr;
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
@@ -5271,29 +5271,15 @@ ZEND_METHOD(reflection_extension, getFun
 	GET_REFLECTION_OBJECT_PTR(module);
 
 	array_init(return_value);
-	if (module->functions) {
-		zval *function;
-		zend_function *fptr;
-		const zend_function_entry *func = module->functions;
-
-		/* Is there a better way of doing this? */
-		while (func->fname) {
-			int fname_len = strlen(func->fname);
-			char *lc_name = zend_str_tolower_dup(func->fname, fname_len);
-			
-			if (zend_hash_find(EG(function_table), lc_name, fname_len + 1, (void**) &fptr) == FAILURE) {
-				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Internal error: Cannot find extension function %s in global function table", func->fname);
-				func++;
-				efree(lc_name);
-				continue;
-			}
-
+	zend_hash_internal_pointer_reset_ex(CG(function_table), &iterator);
+	while (zend_hash_get_current_data_ex(CG(function_table), (void **) &fptr, &iterator) == SUCCESS) {
+		if (fptr->common.type==ZEND_INTERNAL_FUNCTION
+			&& fptr->internal_function.module == module) {
 			ALLOC_ZVAL(function);
 			reflection_function_factory(fptr, NULL, function TSRMLS_CC);
-			add_assoc_zval_ex(return_value, func->fname, fname_len+1, function);
-			func++;
-			efree(lc_name);
+			add_assoc_zval(return_value, fptr->common.function_name, function);
 		}
+		zend_hash_move_forward_ex(CG(function_table), &iterator);
 	}
 }
 /* }}} */
diff -up php-5.5.7RC1/ext/reflection/tests/ReflectionExtension_bug66218.phpt.prev php-5.5.7RC1/ext/reflection/tests/ReflectionExtension_bug66218.phpt
--- php-5.5.7RC1/ext/reflection/tests/ReflectionExtension_bug66218.phpt.prev	2013-12-02 16:31:00.840348312 +0100
+++ php-5.5.7RC1/ext/reflection/tests/ReflectionExtension_bug66218.phpt	2013-12-02 15:42:47.726878417 +0100
@@ -0,0 +1,25 @@
+--TEST--
+ReflectionExtension::getFunctions() ##6218 zend_register_functions breaks reflection
+--SKIPIF--
+<?php
+if (!extension_loaded('reflection')) print 'skip: missing reflection extension';
+if (PHP_SAPI != "cli") die("Skip: CLI only test");
+?>
+--FILE--
+<?php
+$r = new ReflectionExtension('standard');
+$t = $r->getFunctions();
+var_dump($t['cli_set_process_title']);
+var_dump($t['cli_get_process_title']);
+?>
+Done
+--EXPECTF--
+object(ReflectionFunction)#%d (1) {
+  ["name"]=>
+  string(21) "cli_set_process_title"
+}
+object(ReflectionFunction)#%d (1) {
+  ["name"]=>
+  string(21) "cli_get_process_title"
+}
+Done
diff -up php-5.5.7RC1/Zend/tests/bug66218.phpt.prev php-5.5.7RC1/Zend/tests/bug66218.phpt
--- php-5.5.7RC1/Zend/tests/bug66218.phpt.prev	2013-12-02 16:31:15.704395109 +0100
+++ php-5.5.7RC1/Zend/tests/bug66218.phpt	2013-12-02 14:41:49.085440975 +0100
@@ -0,0 +1,22 @@
+--TEST--
+Bug #66218 zend_register_functions breaks reflection
+--SKIPIF--
+<?php
+if (PHP_SAPI != "cli") die("Skip: CLI only test");
+?>
+--FILE--
+<?php
+$tab = get_extension_funcs("standard");
+$fcts = array("dl", "cli_set_process_title", "cli_get_process_title");
+foreach ($fcts as $fct) {
+	if (in_array($fct, $tab)) {
+		echo "$fct Ok\n";
+	}
+}
+?>
+Done
+--EXPECTF--
+dl Ok
+cli_set_process_title Ok
+cli_get_process_title Ok
+Done
diff -up php-5.5.7RC1/Zend/zend_builtin_functions.c.prev php-5.5.7RC1/Zend/zend_builtin_functions.c
--- php-5.5.7RC1/Zend/zend_builtin_functions.c.prev	2013-12-02 11:29:44.399427824 +0100
+++ php-5.5.7RC1/Zend/zend_builtin_functions.c	2013-12-02 15:08:21.889226383 +0100
@@ -2442,36 +2442,49 @@ ZEND_FUNCTION(extension_loaded)
    Returns an array with the names of functions belonging to the named extension */
 ZEND_FUNCTION(get_extension_funcs)
 {
-	char *extension_name;
-	int extension_name_len;
+	char *extension_name, *lcname;
+	int extension_name_len, array;
 	zend_module_entry *module;
-	const zend_function_entry *func;
-
+	HashPosition iterator;
+	zend_function *zif;
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &extension_name, &extension_name_len) == FAILURE) {
 		return;
 	}
-
 	if (strncasecmp(extension_name, "zend", sizeof("zend"))) {
-		char *lcname = zend_str_tolower_dup(extension_name, extension_name_len);
-		if (zend_hash_find(&module_registry, lcname,
-			extension_name_len+1, (void**)&module) == FAILURE) {
-			efree(lcname);
-			RETURN_FALSE;
-		}
+		lcname = zend_str_tolower_dup(extension_name, extension_name_len);
+	} else {
+		lcname = estrdup("core");
+	}
+	if (zend_hash_find(&module_registry, lcname,
+		extension_name_len+1, (void**)&module) == FAILURE) {
 		efree(lcname);
+		RETURN_FALSE;
+	}
 
-		if (!(func = module->functions)) {
-			RETURN_FALSE;
-		}
+	zend_hash_internal_pointer_reset_ex(CG(function_table), &iterator);
+	if (module->functions) {
+		/* avoid BC break, if functions list is empty, will return an empty array */
+		array_init(return_value);
+		array = 1;
 	} else {
-		func = builtin_functions;
+		array = 0;
+	}
+	while (zend_hash_get_current_data_ex(CG(function_table), (void **) &zif, &iterator) == SUCCESS) {
+		if (zif->common.type==ZEND_INTERNAL_FUNCTION
+			&& zif->internal_function.module == module) {
+			if (!array) {
+				array_init(return_value);
+				array = 1;
+			}
+			add_next_index_string(return_value, zif->common.function_name, 1);
+		}
+		zend_hash_move_forward_ex(CG(function_table), &iterator);
 	}
 
-	array_init(return_value);
+	efree(lcname);
 
-	while (func->fname) {
-		add_next_index_string(return_value, func->fname, 1);
-		func++;
+	if (!array) {
+		RETURN_FALSE;
 	}
 }
 /* }}} */