Fixed to generate an error when a non-scalar value is passed in

`PDO_PARAM_EVT_EXEC_PRE` of `pdo_mysql_stmt_param_hook` unless
it is a `Stringable` object.

Author: SakiTakamachi

ext/pdo_mysql/mysql_statement.c

@@ -27,6 +27,7 @@
 #include "pdo/php_pdo_driver.h"
 #include "php_pdo_mysql.h"
 #include "php_pdo_mysql_int.h"
+#include "zend_interfaces.h"
 
 #ifdef PDO_USE_MYSQLND
 #	define pdo_mysql_stmt_execute_prepared(stmt) pdo_mysql_stmt_execute_prepared_mysqlnd(stmt)
@@ -490,7 +491,14 @@ static int pdo_mysql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_da
 					case IS_DOUBLE:
 						mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, parameter, MYSQL_TYPE_DOUBLE);
 						break;
+					case IS_OBJECT:
+						if(zend_class_implements_interface(Z_OBJCE_P(parameter), zend_ce_stringable)) {
+							mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, parameter, MYSQL_TYPE_VAR_STRING);
+							break;
+						}
+						ZEND_FALLTHROUGH;
 					default:
+						pdo_raise_impl_error(stmt->dbh, stmt, "HY105", "Expected a scalar value or null");
 						PDO_DBG_RETURN(0);
 				}
 
@@ -530,7 +538,19 @@ static int pdo_mysql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_da
 						b->buffer = &Z_DVAL_P(parameter);
 						PDO_DBG_RETURN(1);
 
+					case IS_OBJECT:
+						if(zend_class_implements_interface(Z_OBJCE_P(parameter), zend_ce_stringable)) {
+							convert_to_string(parameter);
+							b->buffer_type = MYSQL_TYPE_STRING;
+							b->buffer = Z_STRVAL_P(parameter);
+							b->buffer_length = Z_STRLEN_P(parameter);
+							*b->length = Z_STRLEN_P(parameter);
+							PDO_DBG_RETURN(1);
+						}
+						ZEND_FALLTHROUGH;
+
 					default:
+						pdo_raise_impl_error(stmt->dbh, stmt, "HY105", "Expected a scalar value or null");
 						PDO_DBG_RETURN(0);
 				}
 #endif /* PDO_USE_MYSQLND */

ext/pdo_mysql/tests/gh13384.phpt

@@ -0,0 +1,64 @@
+--TEST--
+GH-13384 Fixed GH-13167 Fixed the behavior when an inappropriate value was passed to `bindValue` and `bindParam`.
+--EXTENSIONS--
+pdo_mysql
+--SKIPIF--
+<?php
+require_once __DIR__ . '/inc/mysql_pdo_test.inc';
+MySQLPDOTest::skip();
+?>
+--FILE--
+<?php
+require_once __DIR__ . '/inc/mysql_pdo_test.inc';
+$db = MySQLPDOTest::factory();
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
+
+$stringableObject = new class () implements Stringable {
+    public function __toString(): string
+    {
+        return '555';
+    }
+};
+
+echo "Stringable object, bindValue:\n";
+$stmt = $db->prepare('SELECT (?)');
+$stmt->bindValue(1, $stringableObject, PDO::PARAM_INT);
+$stmt->execute();
+var_dump($stmt->fetchAll(PDO::FETCH_ASSOC));
+echo "\n";
+
+echo "Normal object, bindValue:\n";
+try {
+    $stmt = $db->prepare('SELECT (?)');
+    $stmt->bindValue(1, new stdClass(), PDO::PARAM_INT);
+    $stmt->execute();
+} catch (Throwable $e) {
+    echo $e->getMessage()."\n\n";
+}
+
+echo "Array, bindParam:\n";
+try {
+    $stmt = $db->prepare('SELECT (?)');
+    $param = ['aaa'];
+    $stmt->bindParam(1, $param, PDO::PARAM_INT);
+    $stmt->execute();
+} catch (Throwable $e) {
+    echo $e->getMessage();
+}
+?>
+--EXPECT--
+Stringable object, bindValue:
+array(1) {
+  [0]=>
+  array(1) {
+    ["?"]=>
+    string(3) "555"
+  }
+}
+
+Normal object, bindValue:
+SQLSTATE[HY105]: Invalid parameter type: Expected a scalar value or null
+
+Array, bindParam:
+SQLSTATE[HY105]: Invalid parameter type: Expected a scalar value or null