1.获得文件：

　　php.tar.gz

2.安装libxml2：

　　./configure --prefix=/usr/local/libxml2; make; make install;

3.安装php：

　　./configure --prefix=/usr/local/php --with-mysql=/usr/local/mysql --with-apxs=/usr/local/apache2/bin/apxs --with-libxml-dir=/usr/local/libxml2; make; make install;

4.配置apache：

　　vi httpd.conf, 添加AddType application/x-httpd-php .php, AddType application/x-httpd-php-source .phps

　　vi php.ini, registe-globals=on

　　/etc/init.d/httpd restart

5.安装bcmath扩展：

　　cd <php-src>/ext/bcmath;

　　/usr/local/php/bin/phpize;

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

　　make; make install;

　　mv bcmath.so /usr/local/php/lib/php/extensions/;

　　echo "extension=bcmath.so">>php.ini;

linux下安装配置php