$count   = 0;
                    foreach ( $keys as $key ) {
                        if ( $count == $width ) {
                            $string .= "\n" . $spaces . "  ...";
                            break;
                        }
                        $string .= "\n" . $spaces . "  [$key] => ";
                        $string .= $this->var_debug(
                            $variable[$key],
                            $strlen,
                            $width,
                            $depth,
                            $i + 1,
                            $objects
                        );
                        $count ++;
                    }
                    $string .= "\n" . $spaces . '}';
                }
                break;
            case 'object':
                $id = array_search( $variable, $objects, true );
                if ( $id !== false ) {
                    $string .= get_class( $variable ) . '#' . ( $id + 1 ) . ' {...}';
                } else if ( $i == $depth ) {
                    $string .= get_class( $variable ) . ' {...}';
                } else {
                    $id = array_push( $objects, $variable );
                    $array = ( array ) $variable;
                    $spaces = str_repeat( ' ', $i * 2 );
                    $string .= get_class( $variable ) . "#$id\n" . $spaces . '{';
                    $properties = array_keys( $array );
                    foreach ( $properties as $property ) {
                        $name    = str_replace( "\0", ':', trim( $property ) );
                        $string .= "\n" . $spaces . "  [$name] => ";
                        $string .= $this->var_debug(
                            $array[$property],
                            $strlen,
                            $width,
                            $depth,
                            $i + 1,
                            $objects
                        );
                    }
                    $string .= "\n" . $spaces . '}';
                }
                break;
        }

        if ( $i > 0 ) {
            return $string;
        }

        $backtrace = debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS );
        do {
            $caller = array_shift( $backtrace );
        } while (
            $caller &&
            ! isset( $caller['file'] )
        );
        if ( $caller ) {
            $string = $caller['file'] . ':' . $caller['line'] . "\n" . $string;
        }

        echo nl2br( str_replace( ' ', ' ', htmlentities( $string ) ) );
    }

    /**
     * Get HTML code with backtrace information for given exception.
     *
     * @param Exception $exception
     *
     * @return string HTML code.
     */
    protected function _get_backtrace( $exception ) {
        $backtrace = '';
        $trace     = nl2br( $exception->getTraceAsString() );
        $ident     = sha1( $trace );
        if ( ! empty( $trace ) ) {
            $request_uri = '';
            if ( isset( $_SERVER['REQUEST_URI'] ) ) {
                // Remove all whitespaces
                $request_uri = preg_replace( '/\s+/', '', $_SERVER['REQUEST_URI'] );
                // Convert request URI and strip tags
                $request_uri  = strip_tags( htmlspecialchars_decode( $request_uri ) );
                // Limit URL to 100 characters
                $request_uri = substr($request_uri, 0, 100);
            }
            $button_label = __( 'Toggle error details', AI1EC_PLUGIN_NAME );
            $title        = __( 'Error Details:', AI1EC_PLUGIN_NAME );
            $backtrace    = <<<JAVASCRIPT
            <script type="text/javascript">
            jQuery( function($) {
                $( "a[data-rel='$ident']" ).click( function() {
                    jQuery( "#ai1ec-error-$ident" ).slideToggle( "fast" );
                    return false;
                });
            });
            </script>
            <blockquote id="ai1ec-error-$ident" style="display: none;">
                <strong>$title</strong>
                <p>$trace</p>
                <p>Request Uri: $request_uri</p>
            </blockquote>
            <a href="#" data-rel="$ident" class="button">$button_label</a>
JAVASCRIPT;
        }
        return $backtrace;
    }

}