If page slug contains a number

gistfile1.txt

<?php
if(is_user_logged_in()){
$args = array(
	'sort_order'  => 'asc',
	'sort_column' => 'post_title',
	'post_type'   => 'page',
    'numberposts' => -1,
	'post_status' => 'publish',
    'suppress_filters' => false
); 
$pages = get_posts($args);
echo '<table>';
foreach($pages as $page){ //pre($page);
    $slug = $page->post_name;
    $warning = (1 === preg_match('~[0-9]~', $slug)) ? 'style="background:red;"': '';
    echo '<tr '.$warning.'><td style="padding:10px;">'.$page->post_title.'</td><td style="padding:10px;">'.$slug.'</td></tr>';
}
echo '</table>';
}
?>