# apd_set_pprof_trace

(PECL apd >= 0.2)

apd_set_pprof_trace — Starts the session debugging

### 说明

apd_set_pprof_trace ([ string `$dump_directory` = ini_get("apd.dumpdir") [, string `$fragment` = "pprof" ]] ) : string

Starts debugging to pprof_{process_id} in the dump directory.

### 参数

`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.

`fragment`

### 返回值

Returns path of the destination file.

### 范例

Example #1 apd_set_pprof_trace() example

    <?php
    apd_set_pprof_trace();
    ?>

### 参见

- apd_set_session_trace() - Starts the session debugging