Проверка двух условий в одной строке

<div id="main" class="<?php if ($mod_count['sidebar']) { ?>grid_8<?php } else { ?>grid_12<?php } ?>">

<!-- Columns Container -->  
 
        <div id="page">
            <div class="clear"></div>
            <div id="mainbody" class="container_12">
                <?php if ($mod_count['leftbar']) { ?>
                    <div class="grid_3" id="leftbar"><?php cmsModule('leftbar'); ?></div>
                <?php } ?>
                <div id="main" class="<?php 
	if ($mod_count['sidebar']&&$mod_count['leftbar']) { ?>grid_6<?php } 
	elseif ($mod_count['sidebar']||$mod_count['leftbar']) { ?>grid_9<?php } else { ?>grid_12<?php } ?>">
                    <?php cmsModule('maintop'); ?>
                    <?php $messages = cmsCore::getSessionMessages(); ?>
                    <?php if ($messages) { ?>
                    <div class="sess_messages">
                        <?php foreach($messages as $message){ ?>
                            <?php echo $message; ?>
                        <?php } ?>
                    </div>
                    <?php } ?>
                    <?php cmsBody(); ?>
                    <?php cmsModule('mainbottom'); ?>
                </div>
                <?php if ($mod_count['sidebar']) { ?>
                    <div class="grid_3" id="sidebar"><?php cmsModule('sidebar'); ?></div>
                <?php } ?>
            </div>
        </div>
 
<!-- Columns Container -->