diff -urNp -x '*.orig' php-5.6.40.org/ext/pdo/pdo.c php-5.6.40/ext/pdo/pdo.c
--- php-5.6.40.org/ext/pdo/pdo.c	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/pdo/pdo.c	2021-08-23 23:20:05.175752159 +0200
@@ -132,7 +132,7 @@ const zend_function_entry pdo_functions[
 /* {{{ pdo_functions[] */
 #if ZEND_MODULE_API_NO >= 20050922
 static const zend_module_dep pdo_deps[] = {
-#ifdef HAVE_SPL
+#ifdef HAVE_SPL && !COMPILE_DL_SPL
 	ZEND_MOD_REQUIRED("spl")
 #endif
 	ZEND_MOD_END
diff -urNp -x '*.orig' php-5.6.40.org/ext/phar/Makefile.frag php-5.6.40/ext/phar/Makefile.frag
--- php-5.6.40.org/ext/phar/Makefile.frag	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/phar/Makefile.frag	2021-08-23 23:20:05.175752159 +0200
@@ -9,7 +9,7 @@ PHP_PHARCMD_EXECUTABLE = ` \
 		$(top_srcdir)/build/shtool echo -n -- "$(top_builddir)/$(SAPI_CLI_PATH) -n"; \
 		if test "x$(PHP_MODULES)" != "x"; then \
 		$(top_srcdir)/build/shtool echo -n -- " -d extension_dir=$(top_builddir)/modules"; \
-		for i in bz2 zlib phar; do \
+		for i in pcre spl bz2 zlib phar; do \
 			if test -f "$(top_builddir)/modules/$$i.la"; then \
 				. $(top_builddir)/modules/$$i.la; $(top_srcdir)/build/shtool echo -n -- " -d extension=$$dlname"; \
 			fi; \
diff -urNp -x '*.orig' php-5.6.40.org/ext/spl/config.m4 php-5.6.40/ext/spl/config.m4
--- php-5.6.40.org/ext/spl/config.m4	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/spl/config.m4	2021-08-23 23:20:05.175752159 +0200
@@ -22,6 +22,6 @@ int main(int argc, char **argv) {
   CPPFLAGS=$old_CPPFLAGS
   AC_DEFINE_UNQUOTED(HAVE_PACKED_OBJECT_VALUE, $ac_result, [Whether struct _zend_object_value is packed])
   AC_DEFINE(HAVE_SPL, 1, [Whether you want SPL (Standard PHP Library) support]) 
-  PHP_NEW_EXTENSION(spl, php_spl.c spl_functions.c spl_engine.c spl_iterators.c spl_array.c spl_directory.c spl_exceptions.c spl_observer.c spl_dllist.c spl_heap.c spl_fixedarray.c, no)
+  PHP_NEW_EXTENSION(spl, php_spl.c spl_functions.c spl_engine.c spl_iterators.c spl_array.c spl_directory.c spl_exceptions.c spl_observer.c spl_dllist.c spl_heap.c spl_fixedarray.c, $ext_shared)
   PHP_INSTALL_HEADERS([ext/spl], [php_spl.h spl_array.h spl_directory.h spl_engine.h spl_exceptions.h spl_functions.h spl_iterators.h spl_observer.h spl_dllist.h spl_heap.h spl_fixedarray.h])
   PHP_ADD_EXTENSION_DEP(spl, pcre, true)
diff -urNp -x '*.orig' php-5.6.40.org/ext/spl/spl_iterators.c php-5.6.40/ext/spl/spl_iterators.c
--- php-5.6.40.org/ext/spl/spl_iterators.c	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/spl/spl_iterators.c	2021-08-23 23:20:05.175752159 +0200
@@ -60,7 +60,13 @@ PHPAPI zend_class_entry *spl_ce_EmptyIte
 PHPAPI zend_class_entry *spl_ce_AppendIterator;
 PHPAPI zend_class_entry *spl_ce_RegexIterator;
 PHPAPI zend_class_entry *spl_ce_RecursiveRegexIterator;
+#if COMPILE_DL_SPL
+#undef spl_ce_Countable
+zend_class_entry *spl_ce_Countable; // real instance
+extern PHPAPI zend_class_entry *spl_ce_Countable_p; // external one
+#else
 PHPAPI zend_class_entry *spl_ce_Countable;
+#endif
 PHPAPI zend_class_entry *spl_ce_RecursiveTreeIterator;
 
 ZEND_BEGIN_ARG_INFO(arginfo_recursive_it_void, 0)
@@ -3839,6 +3845,10 @@ PHP_MINIT_FUNCTION(spl_iterators)
 	REGISTER_SPL_STD_CLASS_EX(EmptyIterator, NULL, spl_funcs_EmptyIterator);
 	REGISTER_SPL_ITERATOR(EmptyIterator);
 
+#if COMPILE_DL_SPL
+	spl_ce_Countable_p = spl_ce_Countable;
+#endif
+
 	REGISTER_SPL_SUB_CLASS_EX(RecursiveTreeIterator, RecursiveIteratorIterator, spl_RecursiveTreeIterator_new, spl_funcs_RecursiveTreeIterator);
 	REGISTER_SPL_CLASS_CONST_LONG(RecursiveTreeIterator, "BYPASS_CURRENT",      RTIT_BYPASS_CURRENT);
 	REGISTER_SPL_CLASS_CONST_LONG(RecursiveTreeIterator, "BYPASS_KEY",          RTIT_BYPASS_KEY);
diff -urNp -x '*.orig' php-5.6.40.org/ext/spl/spl_iterators.h php-5.6.40/ext/spl/spl_iterators.h
--- php-5.6.40.org/ext/spl/spl_iterators.h	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/spl/spl_iterators.h	2021-08-23 23:20:05.175752159 +0200
@@ -51,7 +51,12 @@ extern PHPAPI zend_class_entry *spl_ce_E
 extern PHPAPI zend_class_entry *spl_ce_AppendIterator;
 extern PHPAPI zend_class_entry *spl_ce_RegexIterator;
 extern PHPAPI zend_class_entry *spl_ce_RecursiveRegexIterator;
+#if COMPILE_DL_SPL
+#define spl_ce_Countable spl_ce_Countable_p
+extern PHPAPI zend_class_entry *spl_ce_Countable_p;
+#else
 extern PHPAPI zend_class_entry *spl_ce_Countable;
+#endif
 extern PHPAPI zend_class_entry *spl_ce_CallbackFilterIterator;
 extern PHPAPI zend_class_entry *spl_ce_RecursiveCallbackFilterIterator;
 
diff -urNp -x '*.orig' php-5.6.40.org/ext/standard/array.c php-5.6.40/ext/standard/array.c
--- php-5.6.40.org/ext/standard/array.c	2019-01-09 10:54:13.000000000 +0100
+++ php-5.6.40/ext/standard/array.c	2021-08-23 23:20:05.175752159 +0200
@@ -49,6 +49,9 @@
 #ifdef HAVE_SPL
 #include "ext/spl/spl_array.h"
 #endif
+#if COMPILE_DL_SPL
+PHPAPI zend_class_entry *spl_ce_Countable_p = NULL; // external one
+#endif
 
 /* {{{ defines */
 #define EXTR_OVERWRITE			0