coolplektor

add_filter('rewrite_rules_array','wp_insertMyRewriteRules');
add_filter('query_vars','wp_insertMyRewriteQueryVars');
add_filter('init','flushRules');

// Adding the var so that WP recognizes it
function wp_insertMyRewriteQueryVars($vars)
{
    array_push($vars, 'user');
    return $vars;
}

// Remember to flush_rules() when adding rules
function flushRules(){
	global $wp_rewrite;
   	$wp_rewrite->flush_rules();
}

// Adding a new rule
function wp_insertMyRewriteRules($rules)
{
	$newrules = array();
	$newrules['(?!\bfirst_escape_page\b)(?!\bsecond_escape_page\b)([A-Za-z0-9\-\_\.]+)/?$'] = 'index.php?user=$matches[1]';
	$finalrules = $newrules + $rules;
        return $finalrules;
}

//Stop wordpress from redirecting
remove_filter('template_redirect', 'redirect_canonical');