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   ÒýÓÃÒ³1:   http://tech.idv2.com/2007/07/06/use-local-so-in-php/
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     ÒýÓÃÒ³2:  http://www.9php.com/FAQ/cxsjl/php/2007/11/9405479103083.html
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-laptop:~/dev/software/php-5.3.2$cd ext
funny@funny-laptop:~/dev/software/php-5.3.2/ext$
½¨Á¢Öмä phpÁ´½ÓsoÏîÄ¿cltest
funny@funny-laptop:~/dev/software/php-5.3.2/ext$ ./ext_skel --extname=cltest
Creating directory cltest
Creating basic files: config.m4 config.w32 .cvsignore cltest.c php_cltest.h CREDITS EXPERIMENTAL tests/001.phpt cltest.php [done].
To use your new extension, you will have to execute the following steps:
1.  $ cd ..
2.  $ vi ext/cltest/config.m4
3.  $ ./buildconf
4.  $ ./configure --[with|enable]-cltest
5.  $ make
6.  $ ./php -f ext/cltest/cltest.php
7.  $ vi ext/cltest/cltest.c
8.  $ make
Repeat steps 3-6 until you are satisfied with ext/cltest/config.m4 and
step 6 confirms that your module is compiled into PHP. Then, start writing
code and repeat the last two steps as often as necessary.
ÐÞ¸Ä ÅäÖÃÎļþconfig.m4
funny@funny-laptop:~/dev/software/php-5.3.2/ext$ vi cltest/config.m4 
ɾ³ý 3 ¸ö dnl
dnl PHP_ARG_WITH(my_module, for my_module support,
dnl Make sure that the comment is aligned:
dnl [ --with-my_module Include my_module support])
»òÕßɾ³ý ϱßÕâ3¸ö dnl
dnl PHP_ARG_ENABLE(my_module, whether to enable my_module support,
dnl Make sure that the comment is aligned:
dnl [ --enable-my_module Enable my_module support])
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