Set useful Drupal development environment variables in settings.php

settings.php

/*
Set some useful development environment variables
*/

# change site name
$conf['site_name'] = 'SITENAME LOCAL';

# turn off caching & aggregation
$conf['cache'] = FALSE;
$conf['block_cache'] = FALSE;
$conf['preprocess_css'] = FALSE;
$conf['preprocess_js'] = FALSE;

# toggle module settings
# $conf['apachesolr_read_only'] = 1;
# $conf['apc_enable'] = FALSE;

# enable developer modules
$conf['devel_enable'] = TRUE;
$conf['devel_themer_enable'] = TRUE;

# display all error messages
$conf['error_level'] = 2;
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

# intercept emails using Devel
$conf['mail_system'] = array(
  'default-system' => 'DevelMailLog',
);