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./othercms/xenForo 2.2.8/install/oc-upgrader.php
<?php

$phpVersion
= phpversion();
if (
version_compare($phpVersion, '7.0.0', '<'))
{
    die(
"PHP 7.0.0 or newer is required. $phpVersion does not meet this requirement. Please ask your host to upgrade PHP.");
}

$rootDir = realpath(__DIR__ . '/..');
chdir($rootDir);

require(
$rootDir . '/src/XF/Install/_upgrader/core.php');
$upgrader = XFUpgraderWeb::create($rootDir);
$upgrader->run();