[PHP Guru question]: run php script from within pecl extension

Hi... For several reasons I need to call a php script every x minutes. I need that on several platforms so I started to write a pecl extension that implements something like a cron service. I am running my php 5.1.5 always together with apache 2.2.3. So I made a small pecl that spawns a thread using apache apr functions. In this thread I want to call a php script, so I do this whenever the time to execute the script is reached: TSRMLS_FETCH(); zend_file_handle zfd; zfd.type = ZEND_HANDLE_FILENAME; zfd.filename = <absolute path to php script to execute> zfd.free_filename = 0; zfd.opened_path = NULL; php_execute_script(&zfd TSRMLS_CC); Obviously I miss something in initing php, because php crashes in main/streams/streams.c function php_stream_locate_url_wrapper() when I call php_execute_script() because the variable 'wrapper_hash' inited at the very beginning in that function appears to become a bad value. So I hope someone here can help me or give me some pointers to get help... Thanks in advance, Roland