Simple logger

logger.php

<?php

// Smaller and friendlier (?) alternative to https://github.com/badphp/logger

function logger($path, $priority=0) {
  return function($level, $msg) use($path, $priority) {
    if ($level > $priority) {
      return false;
    }

    $args = array_slice(func_get_args(), 1);
    if (count($args) > 1) {
      $msg = call_user_func_array('sprintf', $args);
    }

    return error_log("$msg\n", 3, $path);
  };
}

switch ($env = getenv('PHP_ENV') ?: 'dev') {
  case 'dev':  $log_level = LOG_DEBUG; break;
  case 'test': $log_level = LOG_INFO; break;
  default:     $log_level = LOG_ERR; break;
}

$logger = logger("$env.log", $log_level);
$logger(LOG_CRIT, "The application is unavailable");
$logger(LOG_DEBUG, "The value %d should be %s", 123, '123');