- Reverted previous fix for bug #46274 and properly fixed it

- Fixed bug #48060
# Also added tests for pdo_oci as it's the only other driver currently
# using streams: no regression found

ext/pdo/pdo_stmt.c

@@ -583,6 +583,7 @@ static inline void fetch_value(pdo_stmt_t *stmt, zval *dest, int colno, int *typ
 			if (value == NULL) {
 				ZVAL_NULL(dest);
 			} else if (value_len == 0) {
+				/* Warning, empty strings need to be passed as stream */
 				if (stmt->dbh->stringify || new_type == PDO_PARAM_STR) {
 					char *buf = NULL;
 					size_t len;

ext/pdo_oci/tests/bug46274.phpt

@@ -0,0 +1,71 @@
+--TEST--
+Bug #46274 (pdo_pgsql - Segfault when using PDO::ATTR_STRINGIFY_FETCHES and blob)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_oci')) 
+die('skip not loaded');
+require dirname(__FILE__).'/../../pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory('ext/pdo_oci/tests/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);
+
+try {
+	$db->exec("DROP TABLE test_one_blob");
+} catch (Exception $e) {
+}
+
+$db->beginTransaction();
+
+$db->query('CREATE TABLE test_one_blob (id INT NOT NULL, blob1 BLOB)');
+
+$stmt = $db->prepare("INSERT INTO test_one_blob (id, blob1) VALUES (:id, EMPTY_BLOB()) RETURNING blob1 INTO :foo");
+
+$data = 'foo';
+$blob = fopen('php://memory', 'a');
+fwrite($blob, $data);
+rewind($blob);
+
+$id = 1;
+$stmt->bindparam(':id', $id);
+$stmt->bindparam(':foo', $blob, PDO::PARAM_LOB);
+$stmt->execute();
+
+$data = '';
+$blob = fopen('php://memory', 'a');
+fwrite($blob, $data);
+rewind($blob);
+
+$id = 1;
+$stmt->bindparam(':id', $id);
+$stmt->bindparam(':foo', $blob, PDO::PARAM_LOB);
+$stmt->execute();
+
+$res = $db->query("SELECT blob1 from test_one_blob");
+// Resource
+var_dump($res->fetch());
+
+// Empty string
+var_dump($res->fetch());
+
+$db->exec("DROP TABLE test_one_blob");
+
+?>
+--EXPECTF--
+array(2) {
+  ["blob1"]=>
+  string(3) "foo"
+  [0]=>
+  string(3) "foo"
+}
+array(2) {
+  ["blob1"]=>
+  string(0) ""
+  [0]=>
+  string(0) ""
+}

ext/pdo_oci/tests/bug46274_2.phpt

@@ -0,0 +1,77 @@
+--TEST--
+Bug #46274 (pdo_pgsql - Segfault when using PDO::ATTR_STRINGIFY_FETCHES and blob)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_oci')) 
+die('skip not loaded');
+require dirname(__FILE__).'/../../pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory('ext/pdo_oci/tests/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
+
+try {
+	$db->exec("DROP TABLE test_one_blob");
+} catch (Exception $e) {
+}
+
+$db->beginTransaction();
+
+$db->query('CREATE TABLE test_one_blob (id INT NOT NULL, blob1 BLOB)');
+
+$stmt = $db->prepare("INSERT INTO test_one_blob (id, blob1) VALUES (:id, EMPTY_BLOB()) RETURNING blob1 INTO :foo");
+
+$data = 'foo';
+$blob = fopen('php://memory', 'a');
+fwrite($blob, $data);
+rewind($blob);
+
+$id = 1;
+$stmt->bindparam(':id', $id);
+$stmt->bindparam(':foo', $blob, PDO::PARAM_LOB);
+$stmt->execute();
+
+$data = '';
+$blob = fopen('php://memory', 'a');
+fwrite($blob, $data);
+rewind($blob);
+
+$id = 1;
+$stmt->bindparam(':id', $id);
+$stmt->bindparam(':foo', $blob, PDO::PARAM_LOB);
+$stmt->execute();
+
+$res = $db->query("SELECT blob1 from test_one_blob");
+// Resource
+var_dump($row = $res->fetch());
+var_dump(fread($row[0], 1024));
+fclose($row[0]);
+
+// Empty string
+var_dump($row = $res->fetch());
+var_dump(fread($row[0], 1024));
+fclose($row[0]);
+
+$db->exec("DROP TABLE test_one_blob");
+
+?>
+--EXPECTF--
+array(2) {
+  ["blob1"]=>
+  resource(%d) of type (stream)
+  [0]=>
+  resource(%d) of type (stream)
+}
+string(3) "foo"
+array(2) {
+  ["blob1"]=>
+  resource(%d) of type (stream)
+  [0]=>
+  resource(%d) of type (stream)
+}
+string(0) ""

ext/pdo_pgsql/pgsql_statement.c

@@ -619,9 +619,15 @@ static int pgsql_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr, unsigned
 					return 0;
 				} else {
 					*ptr = php_pdo_pgsql_unescape_bytea(*ptr, &tmp_len);
+					if (!tmp_len) {
+						/* Empty string, return as empty stream */
+						*ptr = (char *)php_stream_memory_open(TEMP_STREAM_READONLY, "", 0);
+						*len = 0;
+					} else {
 						*len = tmp_len;
 						*caller_frees = 1;
 					}
+				}
 				break;
 			case PDO_PARAM_NULL:
 			case PDO_PARAM_STR:

ext/pdo_pgsql/tests/bug46274_2.phpt

@@ -47,11 +47,13 @@ $res = $db->query("SELECT blob1 from test_one_blob");
 var_dump($x = $res->fetch());
 var_dump(fread($x['blob1'], 10));
 
-// Empty string
+// Resource
 var_dump($res->fetch());
+var_dump(fread($x['blob1'], 10));
 
-// Empty string
+// Resource
 var_dump($res->fetch());
+var_dump(fread($x['blob1'], 10));
 
 // NULL
 var_dump($res->fetch());
@@ -69,16 +71,18 @@ array(2) {
 string(3) "foo"
 array(2) {
   ["blob1"]=>
-  string(0) ""
+  resource(%d) of type (stream)
   [0]=>
-  string(0) ""
+  resource(%d) of type (stream)
 }
+string(0) ""
 array(2) {
   ["blob1"]=>
-  string(0) ""
+  resource(%d) of type (stream)
   [0]=>
-  string(0) ""
+  resource(%d) of type (stream)
 }
+string(0) ""
 array(2) {
   ["blob1"]=>
   NULL