(PECL)
Starts debugging to pprof_{process_id} in the dump directory.
dump_directory
The directory in which the profile dump file is written. If not set, the apd.dumpdir setting from the php.ini file is used.
Эта функция не возвращает значения после выполнения.
Пример 1. apd_set_pprof_trace() example
<?php apd_set_pprof_trace(); ?>