Description:
------------
I've encountered the same problem as bug 29769 - even with PHP 5.2.6, 5.2.7 RC4 and 5.2.7.7 lates build from 2008.11.21 the error happens:

When using ibase_set_event_handler and there are database operations inside the event-handler-function the php-engine crashes.

Without the database operations inside the event-handler-function everything is working fine.

I've tried to try it with php 5.3 and 6.0 versions - but the php_interbase.dll is missing from this packages?

As soon as an event is caught from the event handler function windows shows me an error report and the event-handler is dead. interestingly the loop that echoes the "sleep" continues until I close the error report from windows - than the script is stopped.

No entry in the php error log about this problem.


Reproduce code:
---------------
function event_handler($event_name, $link) {
    if ($event_name == "EVT_MODUS") {
		echo "EVENT #".$event_name."#\r\n";
		$result= ibase_query ($link, 'SELECT * FROM test');
		while ($row = ibase_fetch_object ($result)) {
			echo 'TEST: '.$row->TEST."\n";
		}
		ibase_free_result($result);    
		ibase_commit($link);
    } 
}
while(1)	{
if (isset($dbi)) ibase_close ($dbi);
$dbi = ibase_connect("localhost:C:/TEST.FDB", "SYSDBA", "masterkey");
ibase_set_event_handler($dbi, "event_handler", "EVT_MODUS");
while(1){
	sleep(2);
	echo "TS: ".strftime("%H:%M:%S")." - Sleep\n";
}
}
ibase_commit ($dbi);
ibase_close ($dbi);


Expected result:
----------------
When a firebird event is posted the event-handler-function should read all the date from the table "TEST" and echo the row "TEST".

Instead it crashes the php engine..

Actual result:
--------------
PHP crash from 5.2.6: 

Thread 1 - System ID 3672
Entry point   msvcrt!_endthreadex+3a 
Create time   21.11.2008 12:26:07 
Time spent in user mode   0 Days 0:0:0.0 
Time spent in kernel mode   0 Days 0:0:0.0 

Function     Arg 1     Arg 2     Arg 3   Source 
php5ts!_zend_hash_index_update_or_next_insert+2c     013d1b88     00000000     01d7fa00    
php5ts!zend_list_insert+65     01dc3598     00000018     003c3581    
php5ts!zend_register_resource+f     01dc2358     01dc3598     00000018    
php_interbase!zif_ibase_query+4d1     00000002     00000002     00000000    
php5ts!zend_do_fcall_common_helper_SPEC+7d9     01d7fb14     00323c78     0112b8b8    
php5ts!ZEND_DO_FCALL_SPEC_CONST_HANDLER+e5     00000000     00323c78     00c0fc2c    
php5ts!execute+1c5     013968e0     00323c78     00000002    
php5ts!zend_call_function+fac     00c0fbd0     00326070     00c0fbd4    
php5ts!call_user_function_ex+5c     00325e28     00000000     0112e4b8    
php5ts!call_user_function+66     00325e28     00000000     0112e4b8    
php_interbase!_php_ibase_callback+134     0112b950     000f000f     01255e40    
GDS32!gds__to_sqlda+1113b     013918c0     0004e640     00000008    
kernel32!BaseThreadStart+37     77c0a341     013918c0     00000000    




PHP5TS!_ZEND_HASH_INDEX_UPDATE_OR_NEXT_INSERT+2CIn php__PID__2920__Date__11_21_2008__Time_12_28_29PM__829__Second_Chance_Exception_C0000005.dmp the assembly instruction at php5ts!_zend_hash_index_update_or_next_insert+2c in c:\applications\php\php5ts.dll from The PHP Group has caused an access violation exception (0xC0000005) when trying to read from memory location 0x00000000 on thread 1