Bug #53932 [NEW]: is_callable invoke autoloading unnecessarilly

From: Operating system: Linux PHP version: 5.3.5 Package: Reproducible crash Bug Type: Bug Bug description:is_callable invoke autoloading unnecessarilly Description: ------------ The PHP core function "is_callable" invokes the autoloading when receives a string callback that has "::", even when the class has not a valid name. It could be smarter invoking autoloading only when the class name is a valid class name, as described by the expression [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]* from documentation (http://www.php.net/manual/en/language.oop5.basic.php). It should check whether a namespace was used too. Often, is_callable function is not invoked in a try/catch context. So, in many cases, it could crash PHP execution. For example, in a dispatcher implementation that receives a controller class and an action (method) by user, create a callback and test it with is_callable. Test script: --------------- <?php function __autoload($class) { printf("Required class: '%s'\n", $class); throw new Exception('Error'); } var_dump(is_callable('invalid name::method')); Expected result: ---------------- bool(false) Actual result: -------------- Required class: 'invalid name' PHP Fatal error: Uncaught exception 'Exception' with message 'Error' in %s:5 -- Edit bug report at http://bugs.php.net/bug.php?id=53932&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53932&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53932&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53932&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53932&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53932&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53932&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53932&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53932&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53932&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53932&r=support Expected behavior: http://bugs.php.net/fix.php?id=53932&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53932&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53932&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53932&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53932&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53932&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53932&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53932&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53932&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53932&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53932&r=mysqlcfg