Hola, para todos aquellos que la habéis cagado y os ha desaparecido el menú de admin, o os habéis equivocado con los roles.

Aqui está la solución:

<?php
/*
* fix admin role.
* Resets the admin role and creates a new user
* adminfix/adminfix and assigns it.
*
* You MUST remove this script after using it.
* It’s the biggest security hole known to man.
*
* Howard Miller – E-Learn Design Ltd.
*/

require_once( ‘config.php’ );
require_once( ‘lib/adminlib.php’ );

echo “<p>RESETING DEFAULT ROLES</p>”;

// assume admin is role number 1
reset_role_capabilities( 1 ); // administrator
reset_role_capabilities( 2 ); // course creator
reset_role_capabilities( 3 ); // teacher
reset_role_capabilities( 4 ); // non editing teacher
reset_role_capabilities( 5 ); // student
reset_role_capabilities( 6 ); // guest
reset_role_capabilities( 7 ); // authenticated user

// reload context
echo “<p>RELOADING CONTEXT</p>”;
$sitecontext = get_context_instance( CONTEXT_SYSTEM );
mark_context_dirty( $sitecontext->path );

// fix the primary admin
$admin = get_admin();
$adminusername = $admin->username;
echo “<p>PRIMARY ADMIN IS ‘$adminusername’, LOG IN WITH THIS</p>”;

// change the password
update_internal_user_password( $admin, ‘moodle’ );
echo “<p>PRIMARY ADMIN (‘$adminusername’) PASSWORD IS NOW ‘moodle’</p>”;

// remove the administrator from all roles
$roles = get_records(‘role’);
foreach( $roles as $role ) {
if ($role->id != 1) {
role_unassign( 0,$admin->id );
}
}
echo “<p>REMOVING ‘$adminusername’ FROM ALL ROLES</p>”;

// assign primary admin to admin role at site context
role_assign( 1,$admin->id,0,$sitecontext->id);
echo “<p>PRIMARY ADMIN IS (RE)ASSIGNED TO ADMIN ROLE AT SITE CONTEXT</p>”;

// reset anything we can think of back to default
echo “<p>RESETTING LOADS OF CONFIG SETTINGS BACK TO DEFAULT:”;
echo “<ul>”;

set_config(‘notloggedinroleid’,6); echo “<li>notloggedinroleid set to GUEST</li>”;
set_config(‘guestroleid’,6); echo “<li>guestroleid set to GUEST</li>”;
set_config(‘defaultuserroleid’,7); echo “<li>defaultuserroleid set to AUTHENTICATED USER</li>”;
set_config(‘defaultcourseroleid’,5); echo “<li>defaultcourseroleid set to STUDENT</li>”;
set_config(‘creatornewroleid’,3); echo “<li>creatornewroleid set to TEACHER</li>”;
set_config(‘defaultfrontpagerole’,0); echo “<li>defaultfrontpagerole to NONE</li>”;

echo “</ul>CONFIG SETTINGS COMPLETE</p>”;

echo “<p>ALL DONE</p>”;

Lo subís al FTP y hacéis

http://tusitio.com/adminfix.php y LISTO

Acordaros de borrar el fichero después del uso.

Fuente