Bug #76283 [NEW]: PDO fetch not throw exception when fetch_type not correct

From: jaylecn at foxmail dot com Operating system: WIN PHP version: 7.2.5 Package: PDO Core Bug Type: Bug Bug description:PDO fetch not throw exception when fetch_type not correct Description: ------------ PDO::FETCH_CLASSTYPE/PDO::FETCH_SERIALIZE can only be used together with PDO::FETCH_CLASS https://github.com/php/php-src/blob/php-7.2.3/ext/pdo/pdo_stmt.c#L1225 it should be throw exception, but 1. if use PDOStatement::setFetchMode(), will throw exception 2. if use PDOStatement::fetch(), fetch type will reset to PDO::ATTR_DEFAULT_FETCH_MODE 3. if use PDOStatement::fetchAll(), fetch type will reset to PDO::FETCH_BOTH Test script: --------------- $statement = $pdo->prepare("SELECT * FROM foo"); $statement->execute([]); // will throw exception $statement->setFetchMode(PDO::FETCH_CLASSTYPE); $row = $statement->fetch(); // fetch type reset to PDO::ATTR_DEFAULT_FETCH_MODE $row = $statement->fetch(PDO::FETCH_CLASSTYPE); // fetch type reset to PDO::FETCH_BOTH $lists = $statement->fetchAll(PDO::FETCH_CLASSTYPE); Expected result: ---------------- see test script Actual result: -------------- I think all these three method should throw exception, but it's not it's a Feature ? -- Edit bug report at https://bugs.php.net/bug.php?id=76283&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76283&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76283&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76283&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76283&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76283&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76283&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76283&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76283&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76283&r=support Expected behavior: https://bugs.php.net/fix.php?id=76283&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76283&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76283&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76283&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76283&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76283&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76283&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76283&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76283&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76283&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76283&r=mysqlcfg