I was reading about this the other day as well. From what I understand the current project he was working on (Zend Engine II) is fronted by a few people from Israel, and after the bombings he refused to work for them. Here's a list of things he has contributed to:
Jani has contributed to php.net in the following ways over the last 12 months:
* as a lead developer for Zend Engine II
* as a lead developer for TSRM (Thread Safety Resource Management)
* by testing and maintaining the build for the PHP core
* by writing/maintaining tests for the standard functions in the PHP core
* as a lead developer for gd, a core extension
* by working as a developer on imap, a core extension
* by working as a developer on session, a core extension
* by working as a developer on sockets, a core extension
* by providing occasional fixes for the testsuite distributed with PHP
* by applying maintenance fixes to the underlying libraries in bcmath, pcre and xmlrpc
* by providing tests and occasional fixes for xml
* by providing occasional fixes for apache2filter, apache2handler, apache_hooks, cgi, cli, dba, dom, iconv, informix, isapi, ldap, mcrypt, mcve, mime_magic, msql, mssql, mysqli, mysql, ncurses, oci8, odbc, openssl, oracle, pgsql, recode, snmp, soap, sqlite, sybase, tidy and tokenizer
* by writing/maintaining tests for mbstring, mhash, pcntl, pspell, shmop and wddx
* by working as a developer on bugs.php.net
