yum -y install openssl

/usr/local/bin/ is the installation directory for php Switch to the etx/openssl directory in the php installation directory cd /root/soft/php-5.2.8/ext/openssl

/usr/local/bin/phpize

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

Check the openssl directory for config.w32 and config0.m4, rename config0.m4 to config.m4. mv config0.m4 config.m4

Perform:

/usr/local/bin/phpize

Compile:

./configure --with-openssl --with-php-config=/usr/local/bin/php-config
make;make install

When the prompt succeeds, add extension = openssl.so to php.ini Restart apache or php-fpm and complete.

PS: why is config0.m4 in the directory instead of config.m4? pcre, zlib and other modules are also config0.m4.