Improve check for :memory: pseudo-filename in SQlite

ext/pdo_sqlite/sqlite_driver.c

@@ -760,7 +760,7 @@ static struct pdo_dbh_methods sqlite_methods = {
 
 static char *make_filename_safe(const char *filename TSRMLS_DC)
 {
-	if (*filename && strncmp(filename, ":memory:", sizeof(":memory:")-1)) {
+	if (*filename && memcmp(filename, ":memory:", sizeof(":memory:"))) {
 		char *fullpath = expand_filepath(filename, NULL TSRMLS_CC);
 
 		if (!fullpath) {

ext/sqlite3/sqlite3.c

@@ -117,7 +117,7 @@ PHP_METHOD(sqlite3, open)
 	if (strlen(filename) != filename_len) {
 		return;
 	}
-	if (strncmp(filename, ":memory:", 8) != 0) {
+	if (memcmp(filename, ":memory:", sizeof(":memory:")) != 0) {
 		if (!(fullpath = expand_filepath(filename, NULL TSRMLS_CC))) {
 			zend_throw_exception(zend_exception_get_default(TSRMLS_C), "Unable to expand filepath", 0 TSRMLS_CC);
 			return;
@@ -1962,7 +1962,7 @@ static int php_sqlite3_authorizer(void *autharg, int access_type, const char *ar
 	switch (access_type) {
 		case SQLITE_ATTACH:
 		{
-			if (strncmp(arg3, ":memory:", sizeof(":memory:")-1) && *arg3) {
+			if (memcmp(arg3, ":memory:", sizeof(":memory:")) && *arg3) {
 				TSRMLS_FETCH();
 
 #if PHP_API_VERSION < 20100412