diff --git a/appveyor/test_task.bat b/appveyor/test_task.bat
index 6bf99ad23ea..6588ce193cc 100644
--- a/appveyor/test_task.bat
+++ b/appveyor/test_task.bat
@@ -58,7 +58,7 @@ rem set OPENSSL_CONF=
 rem set SSLEAY_CONF=
 
 rem prepare for Opcache
-if "%OPCACHE%" equ "1" set OPCACHE_OPTS=-d opcache.enabled=1 -d opcache.enable_cli=1
+if "%OPCACHE%" equ "1" set OPCACHE_OPTS=-d opcache.enabled=1 -d opcache.enable_cli=1 -d opcache.protect_memory=1
 
 rem prepare for enchant
 mkdir c:\enchant_plugins
diff --git a/ext/phar/phar.c b/ext/phar/phar.c
index d34e89b2caf..317f3250615 100644
--- a/ext/phar/phar.c
+++ b/ext/phar/phar.c
@@ -533,28 +533,32 @@ int phar_open_parsed_phar(char *fname, size_t fname_len, char *alias, size_t ali
 {
 	phar_archive_data *phar;
 #ifdef PHP_WIN32
-	char *unixfname;
+	char *save_fname;
+	ALLOCA_FLAG(fname_use_heap)
 #endif
 
 	if (error) {
 		*error = NULL;
 	}
 #ifdef PHP_WIN32
-	unixfname = estrndup(fname, fname_len);
-	phar_unixify_path_separators(unixfname, fname_len);
-
-	if (SUCCESS == phar_get_archive(&phar, unixfname, fname_len, alias, alias_len, error)
-		&& ((alias && fname_len == phar->fname_len
-		&& !strncmp(unixfname, phar->fname, fname_len)) || !alias)
-	) {
-		phar_entry_info *stub;
-		efree(unixfname);
-#else
+	save_fname = fname;
+	if (memchr(fname, '\\', fname_len)) {
+		fname = do_alloca(fname_len + 1, fname_use_heap);
+		memcpy(fname, save_fname, fname_len);
+		fname[fname_len] = '\0';
+		phar_unixify_path_separators(fname, fname_len);
+	}
+#endif
 	if (SUCCESS == phar_get_archive(&phar, fname, fname_len, alias, alias_len, error)
 		&& ((alias && fname_len == phar->fname_len
 		&& !strncmp(fname, phar->fname, fname_len)) || !alias)
 	) {
 		phar_entry_info *stub;
+#ifdef PHP_WIN32
+		if (fname != save_fname) {
+			free_alloca(fname, fname_use_heap);
+			fname = save_fname;
+		}
 #endif
 		/* logic above is as follows:
 		   If an explicit alias was requested, ensure the filename passed in
@@ -581,7 +585,10 @@ int phar_open_parsed_phar(char *fname, size_t fname_len, char *alias, size_t ali
 		return SUCCESS;
 	} else {
 #ifdef PHP_WIN32
-		efree(unixfname);
+		if (fname != save_fname) {
+			free_alloca(fname, fname_use_heap);
+			fname = save_fname;
+		}
 #endif
 		if (pphar) {
 			*pphar = NULL;
@@ -2229,8 +2236,10 @@ int phar_split_fname(const char *filename, size_t filename_len, char **arch, siz
 	ext_len = 0;
 #ifdef PHP_WIN32
 	save = (char *)filename;
-	filename = estrndup(filename, filename_len);
-	phar_unixify_path_separators((char *)filename, filename_len);
+	if (memchr(filename, '\\', filename_len)) {
+		filename = estrndup(filename, filename_len);
+		phar_unixify_path_separators((char *)filename, filename_len);
+	}
 #endif
 	if (phar_detect_phar_fname_ext(filename, filename_len, &ext_str, &ext_len, executable, for_create, 0) == FAILURE) {
 		if (ext_len != -1) {
@@ -2244,7 +2253,9 @@ int phar_split_fname(const char *filename, size_t filename_len, char **arch, siz
 			}
 
 #ifdef PHP_WIN32
-			efree((char *)filename);
+			if (filename != save) {
+				efree((char *)filename);
+			}
 #endif
 			return FAILURE;
 		}
@@ -2269,7 +2280,9 @@ int phar_split_fname(const char *filename, size_t filename_len, char **arch, siz
 	}
 
 #ifdef PHP_WIN32
-	efree((char *)filename);
+	if (filename != save) {
+		efree((char *)filename);
+	}
 #endif
 
 	return SUCCESS;
diff --git a/ext/phar/phar_object.c b/ext/phar/phar_object.c
index 87483417eb4..ea678e185f1 100644
--- a/ext/phar/phar_object.c
+++ b/ext/phar/phar_object.c
@@ -438,6 +438,10 @@ PHP_METHOD(Phar, mount)
 	size_t fname_len, arch_len, entry_len;
 	size_t path_len, actual_len;
 	phar_archive_data *pphar;
+#ifdef PHP_WIN32
+	char *save_fname;
+	ALLOCA_FLAG(fname_use_heap)
+#endif
 
 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "pp", &path, &path_len, &actual, &actual_len) == FAILURE) {
 		return;
@@ -447,7 +451,13 @@ PHP_METHOD(Phar, mount)
 	fname_len = strlen(fname);
 
 #ifdef PHP_WIN32
-	phar_unixify_path_separators(fname, fname_len);
+	save_fname = fname;
+	if (memchr(fname, '\\', fname_len)) {
+		fname = do_alloca(fname_len + 1, fname_use_heap);
+		memcpy(fname, save_fname, fname_len);
+		fname[fname_len] = '\0';
+		phar_unixify_path_separators(fname, fname_len);
+	}
 #endif
 
 	if (fname_len > 7 && !memcmp(fname, "phar://", 7) && SUCCESS == phar_split_fname(fname, fname_len, &arch, &arch_len, &entry, &entry_len, 2, 0)) {
@@ -457,7 +467,7 @@ PHP_METHOD(Phar, mount)
 		if (path_len > 7 && !memcmp(path, "phar://", 7)) {
 			zend_throw_exception_ex(phar_ce_PharException, 0, "Can only mount internal paths within a phar archive, use a relative path instead of \"%s\"", path);
 			efree(arch);
-			return;
+			goto finish;
 		}
 carry_on2:
 		if (NULL == (pphar = zend_hash_str_find_ptr(&(PHAR_G(phar_fname_map)), arch, arch_len))) {
@@ -472,7 +482,8 @@ carry_on2:
 			if (arch) {
 				efree(arch);
 			}
-			return;
+
+			goto finish;
 		}
 carry_on:
 		if (SUCCESS != phar_mount_entry(pphar, actual, actual_len, path, path_len)) {
@@ -485,7 +496,7 @@ carry_on:
 				efree(arch);
 			}
 
-			return;
+			goto finish;
 		}
 
 		if (entry && path && path == entry) {
@@ -496,7 +507,7 @@ carry_on:
 			efree(arch);
 		}
 
-		return;
+		goto finish;
 	} else if (HT_IS_INITIALIZED(&PHAR_G(phar_fname_map)) && NULL != (pphar = zend_hash_str_find_ptr(&(PHAR_G(phar_fname_map)), fname, fname_len))) {
 		goto carry_on;
 	} else if (PHAR_G(manifest_cached) && NULL != (pphar = zend_hash_str_find_ptr(&cached_phars, fname, fname_len))) {
@@ -512,6 +523,14 @@ carry_on:
 	}
 
 	zend_throw_exception_ex(phar_ce_PharException, 0, "Mounting of %s to %s failed", path, actual);
+
+finish: ;
+#ifdef PHP_WIN32
+	if (fname != save_fname) {
+		free_alloca(fname, fname_use_heap);
+		fname = save_fname;
+	}
+#endif
 }
 /* }}} */
 
@@ -570,8 +589,10 @@ PHP_METHOD(Phar, webPhar)
 	}
 
 #ifdef PHP_WIN32
-	fname = estrndup(fname, fname_len);
-	phar_unixify_path_separators(fname, fname_len);
+	if (memchr(fname, '\\', fname_len)) {
+		fname = estrndup(fname, fname_len);
+		phar_unixify_path_separators(fname, fname_len);
+	}
 #endif
 	basename = zend_memrchr(fname, '/', fname_len);
 
@@ -3616,6 +3637,10 @@ static void phar_add_file(phar_archive_data **pphar, char *filename, size_t file
 	phar_entry_data *data;
 	php_stream *contents_file = NULL;
 	php_stream_statbuf ssb;
+#ifdef PHP_WIN32
+	char *save_filename;
+	ALLOCA_FLAG(filename_use_heap)
+#endif
 
 	if (filename_len >= sizeof(".phar")-1) {
 		start_pos = '/' == filename[0]; /* account for any leading slash: multiple-leads handled elsewhere */
@@ -3625,6 +3650,15 @@ static void phar_add_file(phar_archive_data **pphar, char *filename, size_t file
 		}
 	}
 
+#ifdef PHP_WIN32
+	save_filename = filename;
+	if (memchr(filename, '\\', filename_len)) {
+		filename = do_alloca(filename_len + 1, filename_use_heap);
+		memcpy(filename, save_filename, filename_len);
+		filename[filename_len] = '\0';
+	}
+#endif
+
 	if (!(data = phar_get_or_create_entry_data((*pphar)->fname, (*pphar)->fname_len, filename, filename_len, "w+b", 0, &error, 1))) {
 		if (error) {
 			zend_throw_exception_ex(spl_ce_BadMethodCallException, 0, "Entry %s does not exist and cannot be created: %s", filename, error);
@@ -3632,7 +3666,7 @@ static void phar_add_file(phar_archive_data **pphar, char *filename, size_t file
 		} else {
 			zend_throw_exception_ex(spl_ce_BadMethodCallException, 0, "Entry %s does not exist and cannot be created", filename);
 		}
-		return;
+		goto finish;
 	} else {
 		if (error) {
 			efree(error);
@@ -3643,12 +3677,12 @@ static void phar_add_file(phar_archive_data **pphar, char *filename, size_t file
 				contents_len = php_stream_write(data->fp, cont_str, cont_len);
 				if (contents_len != cont_len) {
 					zend_throw_exception_ex(spl_ce_BadMethodCallException, 0, "Entry %s could not be written to", filename);
-					return;
+					goto finish;
 				}
 			} else {
 				if (!(php_stream_from_zval_no_verify(contents_file, zresource))) {
 					zend_throw_exception_ex(spl_ce_BadMethodCallException, 0, "Entry %s could not be written to", filename);
-					return;
+					goto finish;
 				}
 				php_stream_copy_to_stream_ex(contents_file, data->fp, PHP_STREAM_COPY_ALL, &contents_len);
 			}
@@ -3678,6 +3712,14 @@ static void phar_add_file(phar_archive_data **pphar, char *filename, size_t file
 			efree(error);
 		}
 	}
+
+finish: ;
+#ifdef PHP_WIN32
+	if (filename != save_filename) {
+		free_alloca(filename, filename_use_heap);
+		filename = save_filename;
+	}
+#endif
 }
 /* }}} */