A script to test that all the capabilities in this version of Moodle have a corresponding docs page

testdocs.php

<?php

define('NO_OUTPUT_BUFFERING', true);

require_once('config.php');
require_once($CFG->libdir . '/filelib.php');
require_login();
require_capability('moodle/site:config', context_system::instance());

$PAGE->set_context(context_system::instance());
$PAGE->set_url('/testdocs.php');
$OUTPUT->header();
$OUTPUT->heading('Checking capability docs');

$missing = array();
foreach ($ACCESSLIB_PRIVATE->capabilities as $cap => $notused) {
    $url = get_docs_url('Capabilities/' . $cap);
    $docs = download_file_content($url);
    if (strpos($docs, 'There is currently no text in this page') === false) {
        $missing[] = html_writer::link($url, $url);
        $OUTPUT->notification($cap . ' missing.');
    } else {
        $OUTPUT->notification($cap . ' OK.');
    }
    flush();
}

if (empty($missing)) {
    $OUTPUT->heading('All OK');
} else {
    $OUTPUT->heading('Missing docs pages');
    echo html_writer::alist($missing);
}
$OUTPUT->footer();