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http://www.phpq.net/doc/php/ref.apd.php
http://pecl.php.net/package/apd 


简介

        APD 是 Advanced PHP Debugger,即高级 PHP 调试器。是用来给 PHP 代码提供规划与纠错的能力,以及提供了显示整个堆栈追踪的能力。
        APD 支持交互式纠错,但默认是将数据写入跟踪文件。它还提供了基于事件的日志,因此不同级别的信息(包括函数调用,参数传递,计时等)可以对个别的脚本打开或关闭。

        APD 是一个 Zend 扩展库,修改了 PHP 内部处理函数调用的方式,因此有可能与其它 Zend 扩展库(例如 Zend Optimizer)不兼容。


安装

        APD 目前作为一个 PECL 扩展,可以从 » http://pecl.php.net/package/apd 得到。确保安装了 CGI 版的 PHP 并且在当前目录下可以运行,以及可以运行 phpize 脚本。

        运行以下命令以下载,编译并安装最新稳定版的 APD:

                pear install apd 

        这将自动把 APD Zend 扩展安装到 PHP 扩展库目录中。不是一定要放到那里,可以将此模块存放到任何 PHP 可以读取的目录中,只要正确设定了相应的 zend_extension 参数即可。

        Windows 用户可以从 » http://snaps.php.net/win32/PECL_STABLE/ 下载扩展库的 DLL 文件 php_apd.dll。

        在 INI 文件中,加入下面几行:

                zend_extension = /absolute/path/to/apd.so
                apd.dumpdir = /absolute/path/to/trace/directory
                apd.statement_tracing = 0 

        根据 PHP 版本,zend_extension 指令可以是以下之一:

        zend_extension              (non ZTS, non debug build)
        zend_extension_ts           (    ZTS, non debug build)
        zend_extension_debug        (non ZTS,     debug build)
        zend_extension_debug_ts     (    ZTS,     debug build)


方法

        apd_breakpoint ? Stops the interpreter and waits on a CR from the socket
        apd_callstack ? Returns the current call stack as an array
        apd_clunk ? Throw a warning and a callstack
        apd_continue ? Restarts the interpreter
        apd_croak ? Throw an error, a callstack and then exit
        apd_dump_function_table ? Outputs the current function table
        apd_dump_persistent_resources ? Return all persistent resources as an array
        apd_dump_regular_resources ? Return all current regular resources as an array
        apd_echo ? Echo to the debugging socket
        apd_get_active_symbols ? Get an array of the current variables names in the local scope
        apd_set_pprof_trace ? Starts the session debugging
        apd_set_session_trace ? Starts the session debugging
        apd_set_session ? Changes or sets the current debugging level
        apd_set_socket_session_trace ? Starts the remote session debugging
        override_function ? Overrides built-in functions
        rename_function ? Renames orig_name to new_name in the global function table

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