Bug #55475 [NEW]: is_a() triggers autoloader

From: Operating system: PHP version: 5.3.7 Package: Scripting Engine problem Bug Type: Bug Bug description:is_a() triggers autoloader Description: ------------ When calling is_a() with a first argument that is not an object, then __autoload() is triggered: Test script: --------------- <?php function __autoload($class) { echo "Would load: " . $class . PHP_EOL; } $var = "test"; var_dump(is_a($var, 'B')); $obj = new Stdclass; var_dump(is_a($obj, 'C')); ?> Expected result: ---------------- bool(false) bool(false) Actual result: -------------- Would load: test bool(false) bool(false) -- Edit bug report at https://bugs.php.net/bug.php?id=55475&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=55475&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=55475&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=55475&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=55475&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=55475&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=55475&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=55475&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=55475&r=needscript Try newer version: https://bugs.php.net/fix.php?id=55475&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=55475&r=support Expected behavior: https://bugs.php.net/fix.php?id=55475&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=55475&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=55475&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=55475&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=55475&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=55475&r=dst IIS Stability: https://bugs.php.net/fix.php?id=55475&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=55475&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=55475&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=55475&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=55475&r=mysqlcfg