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At this moment each conference in CORE needs its own vhost, and it is not possible to run conferences under a sub directory (for instance https://www.nren.edu/conferences/myconf).
PHP5
PHP needs to be configured according to this table:
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You need version 1.11.0 or higher. This will need to be downloaded separately. Packaged versions in Debian or Ubuntu might be too old, but the installer will tell you so. You can download a tar ball of the latest Zend Framework from http://framework.zend.com/download/latest. The "Minimal" version is sufficient.
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