SCA is packaged along with SDO in one combined package on PECL.
See http://www.php.net/sdo#sdo.installation for installing the
SCA_SDO package from PECL. The SCA code must be on the include path of
your PHP installation, for example if it is installed as
/usr/local/lib/php/SCA, the include_path directive must include
/usr/local/lib/php