PHPDaemon\Clients\Mongo\Pool::find PHP Method

    public function find($p, $cb)
    {
        if (!isset($p['offset'])) {
            $p['offset'] = 0;
        }
        if (!isset($p['limit'])) {
            $p['limit'] = 0;
        }
        if (!isset($p['opts'])) {
            $p['opts'] = '0';
        }
        if (isset($p['tailable']) && $p['tailable']) {
            $p['opts'] = '01000' . (isset($p['await']) && $p['await'] ? '1' : '0') . '00';
        }
        if (!isset($p['where'])) {
            $p['where'] = [];
        }
        $this->_params($p);
        $o = [];
        $s = false;
        foreach ($p as $k => $v) {
            if ($k === 'sort' || $k === 'hint' || $k === 'explain' || $k === 'snapshot') {
                if (!$s) {
                    $s = true;
                }
                if ($k === 'sort') {
                    $o['orderby'] = $v;
                } elseif ($k === 'parse_oplog') {
                } elseif ($k === 'rp') {
                    $o['$readPreference'] = $v;
                } else {
                    $o[$k] = $v;
                }
            }
        }
        if ($s) {
            $o['query'] = $p['where'];
        } else {
            $o = $p['where'];
        }
        if (empty($o['orderby'])) {
            unset($o['orderby']);
        }
        if ($this->safeMode) {
            static::safeModeEnc($o);
        }
        try {
            $bson = bson_encode($o);
            if (isset($p['parse_oplog'])) {
                $bson = str_replace("\$gt", "\t\$gt", $bson);
            }
            $cb = CallbackWrapper::wrap($cb);
            $this->request(self::OP_QUERY, chr(bindec(strrev($p['opts']))) . "" . $p['col'] . "" . pack('VV', $p['offset'], $p['limit']) . $bson . (isset($p['fields']) ? bson_encode($p['fields']) : ''), true, null, function ($conn, $reqId = null) use($p, $cb) {
                if (!$conn) {
                    !$cb || $cb(['$err' => 'Connection error.']);
                    return;
                }
                $conn->requests[$reqId] = [$p['col'], $cb, false, isset($p['parse_oplog']), isset($p['tailable'])];
            });
        } catch (\MongoException $e) {
            Daemon::log('MongoClient exception: ' . $e->getMessage() . ': ' . $e->getTraceAsString());
            if ($cb !== null) {
                $cb(['$err' => $e->getMessage(), '$query' => $o, '$fields' => isset($p['fields']) ? $p['fields'] : null]);
            }
        }
    }