public function write_log($level = 'error', $msg, $php_error = FALSE)
{
    // Start the session if not already started
    if (session_status() == PHP_SESSION_NONE) {
        session_start();
    }
 
    // Write data to the session
    $_SESSION['last_log_time'] = date($this->_date_fmt);
    $_SESSION['last_log_message'] = $msg;
 
    // Check if logging is enabled
    if ($this->_enabled === FALSE) {
        echo "Logging is disabled.\n";
        return FALSE;
    }
 
    $level = strtoupper($level);
 
    // Validate the log level
    if (!isset($this->_levels[$level]) || ($this->_levels[$level] > $this->_threshold)) {
        return FALSE;
    }
 
    $filepath = $this->_log_path . 'log-' . date('Y-m-d') . '.php';
    $message = '';
 
    // Add a PHP header to the log file if it doesn't exist
    if (!file_exists($filepath)) {
        $message .= "<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); ?>\n\n";
    }
 
    // Try to open the log file
    if (!$fp = @fopen($filepath, 'a')) { // Use 'a' for append mode
        return FALSE;
    }
 
    // Append the log message
    $message .= $level . ' ' . (($level === 'INFO') ? ' -' : '-') . ' ' . date($this->_date_fmt) . ' --> ' . $msg . "\n";
 
    // Lock file, write the message, and unlock
    flock($fp, LOCK_EX);
    fwrite($fp, $message);
    flock($fp, LOCK_UN);
    fclose($fp);
 
    // Set file permissions
    @chmod($filepath, 0644); // Use an octal value for permissions
 
    // Print session data to the output
    echo "Session Data:\n";
    echo "Last Log Time: " . $_SESSION['last_log_time'] . "\n";
    echo "Last Log Message: " . $_SESSION['last_log_message'] . "\n";
 
    return TRUE;
}
 

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