From:             
Operating system: Debian
PHP version:      5.2.13
Package:          Reproducible crash
Bug Type:         Bug
Bug description:is_subclass_of fails to autoload the classes

Description:
------------
is_subclass_of fails to autoload the classes causing PHP do die and apache
returns an empty page. NO error is triggered ! It was very hard to find the
cause



My php config it's here:

http://alex.softdev.ro/info.php



Failing function:

function ClassIsA($object_class, $class)

        {

                if ($object_class == $class)

                        return true;

                return (is_subclass_of($object_class, $class));

        }





If changed it works:



function ClassIsA($object_class, $class)

        {

                // use this to force the load of the classes

                if (!class_exists($object_class))

                        throw new Exception("Class $object_class not found");

                // use this to force the load of the classes

                if (!class_exists($class))

                        throw new Exception("Class $class not found");

                        

                if ($object_class == $class)

                        return true;

                return (is_subclass_of($object_class, $class));

        }



looks like calling class_exists calls autoload and works fine



Thanks,

Alex

Test script:
---------------
Failing function:

function ClassIsA($object_class, $class)

        {

                if ($object_class == $class)

                        return true;

                return (is_subclass_of($object_class, $class));

        }





If changed it works:



function ClassIsA($object_class, $class)

        {

                // use this to force the load of the classes

                if (!class_exists($object_class))

                        throw new Exception("Class $object_class not found");

                // use this to force the load of the classes

                if (!class_exists($class))

                        throw new Exception("Class $class not found");

                        

                if ($object_class == $class)

                        return true;

                return (is_subclass_of($object_class, $class));

        }


-- 
Edit bug report at http://bugs.php.net/bug.php?id=51570&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=51570&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=51570&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=51570&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=51570&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=51570&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=51570&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=51570&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=51570&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=51570&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=51570&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=51570&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=51570&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=51570&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=51570&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51570&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51570&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=51570&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=51570&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=51570&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=51570&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=51570&r=mysqlcfg

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