moodle/admin/environment.xml

<?xml version="1.0" encoding="UTF-8" ?>
<COMPATIBILITY_MATRIX>
  <MOODLE version="1.5">
    <DATABASE level="required">
      <VENDOR name="mysql" version="3.23" />
      <VENDOR name="postgres" version="7.4" />
    </DATABASE>
    <PHP version="4.1.0" level="required" />
    <PHP_EXTENSIONS>
      <PHP_EXTENSION name="mbstring" level="optional" />
    </PHP_EXTENSIONS>
  </MOODLE>
  <MOODLE version="1.6">
    <DATABASE level="required">
      <VENDOR name="mysql" version="4.1.16">
        <FEEDBACK>
          <ON_ERROR message="mysql412forlatin" />
        </FEEDBACK>
        <BYPASS function="bypass_mysql_reqs" message="mysqlreqsbypassed" />
      </VENDOR>
      <VENDOR name="postgres" version="7.4" />
    </DATABASE>
    <PHP version="4.3.0" level="required" />
    <PHP_EXTENSIONS>
      <PHP_EXTENSION name="iconv" level="optional">
        <FEEDBACK>
          <ON_CHECK message="iconvrecommended" />
        </FEEDBACK>
      </PHP_EXTENSION>
      <PHP_EXTENSION name="mbstring" level="optional">
        <FEEDBACK>
          <ON_CHECK message="mbstringrecommend" />
        </FEEDBACK>
      </PHP_EXTENSION>
    </PHP_EXTENSIONS>
  </MOODLE>
</COMPATIBILITY_MATRIX>