Thanks so much for your help Brad and Sander. I've downloaded the newest Zend2 from cvs and compiled it into Php-4.3.0-dev. All of the features of data hiding which I would need for this project look nicely implemented in this engine!
But now I'm running a bit of a dilemna. I'm saving serialized objects in a database, but it seems as though the unserialize function is not liking the string that the function serialize outputs. It results in a segmentation fault. I did a gdb trace on it and looked at the zend_hash.c file for maybe a little bit of insight, but nothing jumped out at me as I'm not very familier with php's internal structure. I've attached the trace and code below. I've noticed a bug in the bug tracking system http://bugs.php.net/bug.php?id=17728, that looks related and unresolved. Any help would be appreciated! Thank you! Ben Dischinger Here is the code that produces the fault: /** * getObject - Returns the object associated with oid from the database **/ function getObject($oid){ //Get Serialization String and unserialize it if($result = $this->getSingleResult("select serialization from phpflux_lang_object where oid=$oid")){ $serial = $result['serialization']; echo $serial; return unserialize($serial); } return null; } Here is the gdb output: Starting program: /usr/local/bin/php index.php In fluxInclude(): $Class=phpflux.lang.* In include_dir(): $dirStr=/home/disching/Projects/phpflux/classes/phpflux/lang/ In putObject(): In getSingleResult: $query=select serialization from phpflux_lang_object where oid=16 O:10:"testobject":9:{s:7:"package";s:12:"phpflux.lang";s:11:"objectoid";N;s:11:"objectuid";N;s:11:"objectgid";N;s:11:"objectmod";N;s:16:"objectcomments";N;s:1:"A";s:8:"Object A";s:1:"B";s:8:"Object B";s:1:"C";s:8:"Object C";} Program received signal SIGSEGV, Segmentation fault. zend_hash_copy (target=0x400b9814, source=0x81d2b3c, pCopyConstructor=0x811d200 <zval_add_ref>, tmp=0xbfffc048, size=4) at /root/php4/Zend/zend_hash.c:777 777 if (p->nKeyLength) { (gdb) bt #0 zend_hash_copy (target=0x400b9814, source=0x81d2b3c, pCopyConstructor=0x811d200 <zval_add_ref>, tmp=0xbfffc048, size=4) at /root/php4/Zend/zend_hash.c:777 #1 0x0811f2c9 in _object_and_properties_init (arg=0x400c75f8, class_type=0x81d2afc, properties=0x0) at /root/php4/Zend/zend_API.c:600 #2 0x0811f307 in _object_init_ex (arg=0x400c75f8, class_type=0x81d2afc) at /root/php4/Zend/zend_API.c:610 #3 0x080de205 in php_var_unserialize (rval=0xbfffc214, p=0xbfffc1f8, max=0x400b99cb "", var_hash=0xbfffc1fc) at var_unserializer.re:196 #4 0x080d74e9 in zif_unserialize (ht=1, return_value=0x400c75f8, this_ptr=0x0, return_value_used=1) at /root/php4/ext/standard/var.c:667 #5 0x08130153 in execute (op_array=0x400b456c) at /root/php4/Zend/zend_execute.c:2079 #6 0x08130245 in execute (op_array=0x400aca14) at /root/php4/Zend/zend_execute.c:2103 #7 0x0811e304 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /root/php4/Zend/zend.c:832 #8 0x080fd169 in php_execute_script (primary_file=0xbffffa80) at /root/php4/main/main.c:1504 #9 0x08136a60 in main (argc=2, argv=0xbffffb24) at /root/php4/sapi/cli/php_cli.c:683 #10 0x42017499 in __libc_start_main () from /lib/i686/libc.so.6 Brad LaFountain wrote: >That .txt only talks about private members. Zend2 also implements protected >data members. > > - brad >--- Sander Roobol <[EMAIL PROTECTED]> wrote: > >>The Zend Engine 2 implements this. See http://www.php.net/ZEND_CHANGES.txt >> >>Sander >> >>On Fri, Aug 16, 2002 at 03:13:57AM -0500, Ben Dischinger wrote: >> >>>Hello, >>> >>>My question is if there is anyone working on an implementation of data >>> >>hiding in php? IE Public, private, and protected data types within php >>classes. I can not find anywhere mentioning this besides very few websites >>that say it is on the "TODO" list. >> >>>The research that I'm doing involves dynamically programming php from the >>> >>internet collectively with many users, of which some would have restricted >>access rights to specific objects. All objects would have certain data that >>I would need to be of type private, ie owner id, permission mode, etc... in >>order for the object security model to be safe. Without data hiding any user >>using this system could simply type $Current_User->UID=0 which would then >>change the owner of this object, which happens to be a user to 0, or god. >>There may be a different way to implement this that I'm not seeing, but any >>model that I come up with in php I can circumvent by some simular means. >> >>>I may need to implement a servlet in java that keeps track of currently >>> >>logged in users and objects in memory, but this would be more overhead than >>wanted. If data hiding was implemented in PHP I would be very excited. If >>there is not already someone working on it, perhaps I will roll up my sleeves >>and get my elbows dirty. >> >>>Thank you so much for reading. >>> >>>Ben Dischinger >>>NDSU Computer Science >>> >>-- >>PHP Development Mailing List <http://www.php.net/> >>To unsubscribe, visit: http://www.php.net/unsub.php >> > > >__________________________________________________ >Do You Yahoo!? >HotJobs - Search Thousands of New Jobs >http://www.hotjobs.com >
