Add general extensions such as mbstring extensions for PHP

Add general extensions such as mbstring extensions for PHP
Note: The default generated extension.so directory is
/usr/local/php5/lib/php/extensions/no-debug-non-zts-20090626/
Set the Extension_dir directory to point to it

Environment php5.2.14, mbstring extensions are not supported after compilation.
If PHP's source code package is/usr/local/src/php-5.2.14
PHP installation directory is/usr/local/php
# cd/usr/local/src/php-5.2.14/ext/mbstring/
#/usr/local/php/bin/phpize
#./configure–with-php-config=/usr/local/php/bin/php-config
# make
# make Install
Add extension=mbstring.so in php.ini after execution
Restart the Web server, look at Phpinfo, should support mbstring

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