Log errors as defined by administrator.

Error levels:

• 0 = Log errors to database.
• 1 = Log errors to database and to screen.

File

drupal-6.x/includes/common.inc, line 661

Common functions that many Drupal modules will need to reference.

Code

function drupal_error_handler($errno, $message, $filename, $line, $context) {
  // If the @ error suppression operator was used, error_reporting will have
  // been temporarily set to 0.
  if (error_reporting() == 0) {
    return;
  }

  if ($errno & (E_ALL ^ E_DEPRECATED)) {
    $types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning', 4096 => 'recoverable fatal error');

    // For database errors, we want the line number/file name of the place that
    // the query was originally called, not _db_query().
    if (isset($context[DB_ERROR])) {
      $backtrace = array_reverse(debug_backtrace());

      // List of functions where SQL queries can originate.
      $query_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');

      // Determine where query function was called, and adjust line/file
      // accordingly.
      foreach ($backtrace as $index => $function) {
        if (in_array($function['function'], $query_functions)) {
          $line = $backtrace[$index]['line'];
          $filename = $backtrace[$index]['file'];
          break;
        }
      }
    }

    // Try to use filter_xss(). If it's too early in the bootstrap process for
    // filter_xss() to be loaded, use check_plain() instead.
    $entry = check_plain($types[$errno]) . ': ' . (function_exists('filter_xss') ? filter_xss($message) : check_plain($message)) . ' in ' . check_plain($filename) . ' on line ' . check_plain($line) . '.';

    // Force display of error messages in update.php.
    if (variable_get('error_level', 1) == 1 || strstr($_SERVER['SCRIPT_NAME'], 'update.php')) {
      drupal_set_message($entry, 'error');
    }

    watchdog('php', '%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line), WATCHDOG_ERROR);
  }
}