php apc的安装

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APC

正如PHP官方手册说明：

Alternative PHP Cache (APC) 是一个开放自由的PHP opcode 缓存。它的目标是提供一个自由、开放，和健全的框架用于缓存和优化PHP的中间代码。

官方下载列表

http://pecl.php.net/package/apc

csdn下载

http://download.csdn.net/detail/mengxiangbaidu/3763918

说明：

phpize

http://php.net/manual/en/install.pecl.phpize.php

http://cn2.php.net/manual/zh/install.pecl.phpize.php

ubuntu下安装

apt-get install php5-dev

安装完直接运行会报错

Cannot find config.m4.
Make sure that you run '/usr/bin/phpize' in the top level source directory of the module

说明你编译的东西没有config.m4.文件。如果在apc目录运行，就不会有错了。因为apc下提供了config.m4

用 phpize 编译共享 PECL 扩展库

有时候不能用 pear 安装命令。这可能是因为在防火墙后面，或者是因为想要安装的扩展库还没有 PEAR 兼容的包，例如 CVS 中尚未发布的扩展库。如果要编译这种扩展库，可以用更底层的编译工具来手工进行编译。

phpize 命令是用来准备 PHP 扩展库的编译环境的。下面例子中，扩展库的源程序位于 extname 目录中：

$ cd extname$ phpize$ ./configure$ make# make install

成功的安装将创建 extname.so 并放置于 PHP 的扩展库目录中。需要调整 php.ini，加入 extension=extname.so 这一行之后才能使用此扩展库。

/usr/local/php/bin/php-config

是指你的php-config的位置

你可以php-config看一下所在路径

我的是

./configure --with-php-config=/usr/bin/php-config

如果出现如下错误

apc fatal error: pcre.h: No such file or directory

http://stackoverflow.com/questions/4720666/sudo-pecl-install-apc-returns-error

PCRE is a dependency for installing APC. You can install it pretty quick with

yum install pcre-devel or apt-get install libpcre3-dev

once it's installed, re-run

sudo pecl install apc

按照解压压缩包，就看到了install，打开看看就有从安装要求、编译、安装、到配置参数的详细解释。tests目录中提供了详细的php开发demos

Installation Instructions for APC
---------------------------------

This version of APC should work on PHP 4.3.0 - 4.4.x and
5.1.0 - 5.2.x. Yes, that means PHP 5.0.x is no longer
supported. Upgrade to PHP 5.1.x or 5.2.x and you will
notice all sorts of performance increases.

CVS Instructions
----------------
Building from CVS can be done like this:

svn co http://svn.php.net/repository/pecl/apc/trunk apc
cd apc
phpize
./configure --with-php-config=/usr/local/php/bin/php-config
make
export TEST_PHP_ARGS='-n'
make test
make install

Suggested Configuration (in your php.ini file)
----------------------------------------------
extension=apc.so
apc.enabled=1
apc.shm_size=128M
apc.ttl=7200
apc.user_ttl=7200
apc.enable_cli=1

These are fully described at the bottom of this file.

+---------------------+
| QUICK INSTALL (DSO) |
+---------------------+

These instructions assume your PHP installation is located in /usr/local/php and you
want Apache optimizations (--with-apxs).

$ gunzip -c apc_x.y.tar.gz | tar xf -
$ cd apc_x.y
$ /usr/local/php/bin/phpize
$ ./configure --with-php-config=/usr/local/php/bin/php-config
$ make
$ make install

You will probably need to run the final command (make install) as root.

The above sequence of commands will install a .so file in your PHP
installation extension directory. The output of make install should display
that path to the screen.

Next you must edit your php.ini file, which is normally located in
/usr/local/php/lib/php.ini, and add the following line:

extension="apc.so"

Replace "/path/to/php/extensions" with whatever path was displayed when you
ran make install above.

Then restart your web server and consult the output of phpinfo(). If there is
an informational section for APC, the installation was successful.

+------------------------+
| QUICK INSTALL (Static) |
+------------------------+

APC will not successfully compile on all systems as a DSO. If you run into
problems using the DSO quick install, you can try to compile it statically
into PHP. (The DSO install is recommended, though.)

These instructions assume the current directory is the root of the PHP source
tree, and that you have already configured PHP by running its bundled
configure script.

$ cd ext
$ gunzip -c apc_x.y.tar.gz | tar xf -
$ cd ..
$ ./buildconf
$ ./config.nice
$ make
$ make install

Once this is complete, simply restart your web server. You do not need to
modify your php.ini file to enable APC.

+-----------------+
| VERBOSE INSTALL |
+-----------------+

These instructions assume your PHP installation is located in /usr/local/php.

1. Unpack your distribution file.

You will have downloaded a file named something like apc_x.y.tar.gz.
Unzip this file with a command like

gunzip apc_x.y.tar.gz

Next you have to untar it with

tar xvf apc_x.y.tar

This will create an apc_x.y directory. cd into this new directory:

cd apc_x.y

2. Run phpize.

phpize is a script that should have been installed with PHP, and is
normally located in /usr/local/php/bin assuming you installed PHP in
/usr/local/php. (If you do not have the phpize script, you must reinstall
PHP and be sure not to disable PEAR.)

Run the phpize command:

/usr/local/php/bin/phpize

Its output should resemble this:

autoheader: `config.h.in' is created
You should update your `aclocal.m4' by running aclocal.
Configuring for:
PHP Api Version: 20020918
Zend Module Api No: 20020429
Zend Extension Api No: 20021010

phpize should create a configure script in the current directory. If you
get errors instead, you might be missing some required development tools,
such as autoconf or libtool. You can try downloading the latest versions
of those tools and running phpize again.

3. Run the configure script.

phpize creates a configure script. The only option you need to specify is
the location of your php-config script:

./configure --enable-apc

php-config should be located in the same directory as phpize.

If you prefer to use mmap instead of the default IPC shared memory support,
add --enable-apc-mmap to your configure line.

If you prefer to use sysv IPC semaphores over the safer fcntl() locks, add
--enable-sem to your configure line. If you don't have a problem
with your server segaulting, or any other unnatural accumulation of
semaphores on your system, the semaphore based locking is slightly faster.

4. Compile and install the files. Simply type: make install

(You may need to be root in order to install)

If you encounter errors from libtool or gcc during this step, please
contact the project maintainer (dcowgill@php.net).

5. Edit your php.ini

make install should have printed a line resembling the following:

Installing shared extensions: /path/to/extension/

Copy the path /path/to/extension/ and add the following line to your
php.ini file (normally located in /usr/local/php/lib/php.ini):

extension="apc.so"

If you don't have a php.ini file in that location, you can create it now.

6. Restart the web server and test the installation.

Restart your web server now (for apache, it's apachectl restart) and
create a small test PHP file in your document root. The file should
contain just the following line:

<?php phpinfo() ?>

Request that file in a web browser. If there is an entry for APC in the
list of installed modules, the installation was successful.

If APC is not listed, consult your web server error log. If it contains an
error message saying that it can't load the APC extension, your system
might not be able to load shared libraries created with PHP's build
system. One alternative would be to compile APC statically into PHP. See
the Quick Install (Static) instructions above.

You should consult your error log anyway to see if APC generated any
errors. On BSD-based platforms, it is typical for APC to be unable to
allocate the default-sized shared memory segment. See below for hints on
raising your system's shared memory limitations.

+-----------------+
| CONFIGURING APC |
+-----------------+

Although the default APC settings are fine for many installations, serious
users should consider tuning the following parameters:

OPTION DESCRIPTION
------------------ --------------------------------------------------
apc.enabled This can be set to 0 to disable APC. This is
primarily useful when APC is statically compiled
into PHP, since there is no other way to disable
it (when compiled as a DSO, the zend_extension
line can just be commented-out).
(Default: 1)

apc.shm_segments The number of shared memory segments to allocate
for the compiler cache. If APC is running out of
shared memory but you have already set
apc.shm_size as high as your system allows, you
can try raising this value. Setting this to a
value other than 1 has no effect in mmap mode
since mmap'ed shm segments don't have size limits.
(Default: 1)

apc.shm_size The size of each shared memory segment in MB.
By default, some systems (including most BSD
variants) have very low limits on the size of a
shared memory segment. M/G suffixes must be used.
(Default: 30)


apc.optimization This option has been deprecated.
(Default: 0)

apc.num_files_hint A "hint" about the number of distinct source files
that will be included or requested on your web
server. Set to zero or omit if you're not sure;
this setting is mainly useful for sites that have
many thousands of source files.
(Default: 1000)

apc.user_entries_hint Just like num_files_hint, a "hint" about the number
of distinct user cache variables to store.
Set to zero or omit if you're not sure;
(Default: 4096)

apc.ttl The number of seconds a cache entry is allowed to
idle in a slot in case this cache entry slot is
needed by another entry. Leaving this at zero
means that your cache could potentially fill up
with stale entries while newer entries won't be
cached.
(Default: 0)

apc.user_ttl The number of seconds a user cache entry is allowed
to idle in a slot in case this cache entry slot is
needed by another entry. Leaving this at zero
means that your cache could potentially fill up
with stale entries while newer entries won't be
cached.
(Default: 0)

apc.gc_ttl The number of seconds that a cache entry may
remain on the garbage-collection list. This value
provides a failsafe in the event that a server
process dies while executing a cached source file;
if that source file is modified, the memory
allocated for the old version will not be
reclaimed until this TTL reached. Set to zero to
disable this feature.
(Default: 3600)

apc.cache_by_default On by default, but can be set to off and used in
conjunction with positive apc.filters so that files
are only cached if matched by a positive filter.
(Default: On)

apc.filters A comma-separated list of POSIX extended regular
expressions. If any pattern matches the source
filename, the file will not be cached. Note that
the filename used for matching is the one passed
to include/require, not the absolute path. If the
first character of the expression is a + then the
expression will be additive in the sense that any
files matched by the expression will be cached, and
if the first character is a - then anything matched
will not be cached. The - case is the default, so
it can be left off.
(Default: "")

apc.mmap_file_mask If compiled with MMAP support by using --enable-mmap
this is the mktemp-style file_mask to pass to the
mmap module for determing whether your mmap'ed memory
region is going to be file-backed or shared memory
backed. For straight file-backed mmap, set it to
something like /tmp/apc.XXXXXX (exactly 6 X's).
To use POSIX-style shm_open/mmap put a ".shm"
somewhere in your mask. eg. "/apc.shm.XXXXXX"
You can also set it to "/dev/zero" to use your
kernel's /dev/zero interface to anonymous mmap'ed
memory. Leaving it undefined will force an
anonymous mmap.
(Default: "")

apc.slam_defense ** DEPRECATED - Use apc.write_lock instead **
On very busy servers whenever you start the server or
modify files you can create a race of many processes
all trying to cache the same file at the same time.
This option sets the percentage of processes that will
skip trying to cache an uncached file. Or think of it
as the probability of a single process to skip caching.
For example, setting this to 75 would mean that there is
a 75% chance that the process will not cache an uncached
file. So the higher the setting the greater the defense
against cache slams. Setting this to 0 disables this
feature.
(Default: 0)

apc.file_update_protection
When you modify a file on a live web server you really
should do so in an atomic manner. That is, write to a
temporary file and rename (mv) the file into its permanent
position when it is ready. Many text editors, cp, tar and
other such programs don't do this. This means that there
is a chance that a file is accessed (and cached) while it
is still being written to. This file_update_protection
setting puts a delay on caching brand new files. The
default is 2 seconds which means that if the modification
timestamp (mtime) on a file shows that it is less than 2
seconds old when it is accessed, it will not be cached.
The unfortunate person who accessed this half-written file
will still see weirdness, but at least it won't persist.
If you are certain you always atomically update your files
by using something like rsync which does this correctly, you
can turn this protection off by setting it to 0. If you
have a system that is flooded with io causing some update
procedure to take longer than 2 seconds, you may want to
increase this a bit.
(Default: 2)

apc.enable_cli Mostly for testing and debugging. Setting this enables APC
for the CLI version of PHP. Normally you wouldn't want to
create, populate and tear down the APC cache on every CLI
request, but for various test scenarios it is handy to be
able to enable APC for the CLI version of APC easily.
(Default: 0)

apc.max_file_size Prevents large files from being cached.
(Default: 1M)

apc.stat Whether to stat the main script file and the fullpath
includes. If you turn this off you will need to restart
your server in order to update scripts.
(Default: 1)

apc.canonicalize Whether to canonicalize paths in stat=0 mode or
fall back to stat behaviour if set to 0
(Default: 0)

apc.write_lock On busy servers when you first start up the server, or when
many files are modified, you can end up with all your processes
trying to compile and cache the same files. With write_lock
enabled, only one process at a time will try to compile an
uncached script while the other processes will run uncached
instead of sitting around waiting on a lock.
(Default: 1)

apc.report_autofilter Logs any scripts that were automatically excluded from being
cached due to early/late binding issues.
(Default: 0)

apc.rfc1867 RFC1867 File Upload Progress hook handler is only available
if you compiled APC against PHP 5.2.0 or later. When enabled
any file uploads which includes a field called
APC_UPLOAD_PROGRESS before the file field in an upload form
will cause APC to automatically create an upload_<key>
user cache entry where <key> is the value of the
APC_UPLOAD_PROGRESS form entry.

Note that the file upload tracking is not threadsafe at this
point, so new uploads that happen while a previous one is
still going will disable the tracking for the previous.
(Default: 0)

apc.rfc1867_prefix Key prefix to use for the user cache entry generated by
rfc1867 upload progress functionality.
(Default: "upload_")

apc.rfc1867_name Specify the hidden form entry name that activates APC upload
progress and specifies the user cache key suffix.
(Default: "APC_UPLOAD_PROGRESS")

apc.rfc1867_freq The frequency that updates should be made to the user cache
entry for upload progress. This can take the form of a
percentage of the total file size or a size in bytes
optionally suffixed with 'k', 'm', or 'g' for kilobytes,
megabytes, or gigabytes respectively (case insensitive).
A setting of 0 updates as often as possible, which may cause
slower uploads.
(Default: 0)

apc.localcache ** REMOVED
apc.localcache.size ** REMOVED

apc.include_once_override
Optimize include_once and require_once calls and avoid the
expensive system calls used.
(Default: 0)

apc.serializer
Defines which serializer should be used. Default is the
standard PHP serializer. Other can be used without having
to re compile apc, like igbinary for example.
(apc.serializer=igbinary)

运行phpinfo看到如下信息

表示安装成功

apc

APC SupportenabledVersion3.1.9APC DebuggingDisabledMMAP SupportEnabledMMAP File Maskno valueLocking typepthread mutex LocksSerialization SupportphpRevision$Revision: 308812 $Build DateNov 7 2011 10:14:57

DirectiveLocal ValueMaster Valueapc.cache_by_defaultOnOnapc.canonicalizeOnOnapc.coredump_unmapOffOffapc.enable_cliOffOffapc.enabledOnOnapc.file_md5OffOffapc.file_update_protection22apc.filtersno valueno valueapc.gc_ttl36003600apc.include_once_overrideOffOffapc.lazy_classesOffOffapc.lazy_functionsOffOffapc.max_file_size1M1Mapc.mmap_file_maskno valueno valueapc.num_files_hint10001000apc.preload_pathno valueno valueapc.report_autofilterOffOffapc.rfc1867OffOffapc.rfc1867_freq00apc.rfc1867_nameAPC_UPLOAD_PROGRESSAPC_UPLOAD_PROGRESSapc.rfc1867_prefixupload_upload_apc.rfc1867_ttl36003600apc.serializerdefaultdefaultapc.shm_segments11apc.shm_size32M32Mapc.slam_defenseOnOnapc.statOnOnapc.stat_ctimeOffOffapc.ttl00apc.use_request_timeOnOnapc.user_entries_hint40964096apc.user_ttl00apc.write_lockOnOn详细的配置你可以在php.ini中加入

加载.so成功，基本就可以使用了