requirements.php

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<?php
if ($vars['num_failures'] != 0) {
    $instruct_text = elgg_echo('install:requirements:instructions:failure');
} elseif ($vars['num_warnings'] != 0) {
    $instruct_text = elgg_echo('install:requirements:instructions:warning');
} else {
    $instruct_text = elgg_echo('install:requirements:instructions:success');
}

echo elgg_autop($instruct_text);

$report = $vars['report'];
foreach ($report as $category => $checks) {
    $title = elgg_echo("install:require:$category");
    echo "<h3>$title</h3>";
    echo "<ul class=\"elgg-require-$category\">";
    foreach ($checks as $check) {
        echo "<li class=\"{$check['severity']}\">";
        echo elgg_autop($check['message']);
        echo "</li>";
    }
    echo "</ul>";
}

$vars['refresh'] = true;

// cannot advance to next step with a failure
if ($vars['num_failures'] != 0) {
    $vars['advance'] = false;
}

echo elgg_view('install/nav', $vars);