ap_hook_child_init  721 sapi/apache2handler/sapi_apache2.c 	ap_hook_child_init(zend_signal_init, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_child_init  723 sapi/apache2handler/sapi_apache2.c 	ap_hook_child_init(php_apache_child_init, NULL, NULL, APR_HOOK_MIDDLE);