Bug #15254: modules are unloaded in the wrong order

From: stephensb@aciworldwide.com Operating system: Linux, Solaris and win32 PHP version: 4.1.1 PHP Bug Type: Reproducible crash Bug description: modules are unloaded in the wrong order zend_hash_destroy destroys things in order. Thus, if one has two loadable modules, one of which depends on the other by calling a function in the initialization or finalization functions, then bad things will happen whichever order they appear in php.ini, since whichever way around they're listed, a function will be called after the providing library has been unloaded. Our fix is simply to change zend_hash_destroy to traverse its list backwards (from ht->pListTail rather than ht->pListHead). (I believe we (probably as MessagingDirect) reported this bug in PHP3 and it was fixed then, but it seems to have reappeared.) -- Edit bug report at: http://bugs.php.net/?id=15254&edit=1