Log and Monitor 404 Errors

A PHP snippet for Log and Monitor 404 Errors.

function my_plugin_log_404_errors() {
    if ( is_404() ) {
        $url = $_SERVER['REQUEST_URI'];
        $referer = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : 'Direct Access';
        $log_message = '404 Error: ' . $url . ' - Referer: ' . $referer . ' - Date: ' . date( 'Y-m-d H:i:s' ) . "\n";
        
        // Log the error to a file
        $log_file = ABSPATH . 'wp-content/plugins/my-plugin-404-errors.log';
        file_put_contents( $log_file, $log_message, FILE_APPEND );
    }
}
add_action( 'template_redirect', 'my_plugin_log_404_errors' );

function my_plugin_log_404_errors() {
    if ( is_404() ) {
        $url = $_SERVER['REQUEST_URI'];
        $referer = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : 'Direct Access';
        $log_message = '404 Error: ' . $url . ' - Referer: ' . $referer . ' - Date: ' . date( 'Y-m-d H:i:s' ) . "\n";
        
        // Log the error to a file
        $log_file = ABSPATH . 'wp-content/plugins/my-plugin-404-errors.log';
        file_put_contents( $log_file, $log_message, FILE_APPEND );
    }
}
add_action( 'template_redirect', 'my_plugin_log_404_errors' );function my_plugin_log_404_errors() {
    if ( is_404() ) {
        $url = $_SERVER['REQUEST_URI'];
        $referer = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : 'Direct Access';
        $log_message = '404 Error: ' . $url . ' - Referer: ' . $referer . ' - Date: ' . date( 'Y-m-d H:i:s' ) . "\n";
        
        // Log the error to a file
        $log_file = ABSPATH . 'wp-content/plugins/my-plugin-404-errors.log';
        file_put_contents( $log_file, $log_message, FILE_APPEND );
    }
}
add_action( 'template_redirect', 'my_plugin_log_404_errors' );

/**
 * Sends 404 error details to a specified webhook.
 *
 * This function uses a non-blocking POST request to avoid delaying page loads.
 */
function my_plugin_send_404_to_webhook() {
    // Only run this logic on a 404 page
    if ( ! is_404() ) {
        return;
    }

    // Define your webhook URL here for easy management
    $webhook_url = 'https://webhooks.your-url';

    // Gather data for the payload
    $data = [
        'url'        => $_SERVER['REQUEST_URI'],
        'referer'    => isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : 'Direct Access',
        'user_agent' => isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : 'Not Provided',
        'ip_address' => isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : 'Not Provided',
        'timestamp'  => current_time('mysql'),
    ];

    // Arguments for the remote POST request
    $args = [
        'body'        => json_encode($data), // Send data as a JSON string
        'headers'     => [
            'Content-Type' => 'application/json',
        ],
        'timeout'     => 5,  // Don't wait more than 5 seconds
        'blocking'    => false, // Make the request asynchronous (non-blocking)
        'sslverify'   => true, // Recommended to keep true for security
    ];

    // Send the POST request
    wp_remote_post($webhook_url, $args);
}

// Hook into WordPress to run the function
add_action('template_redirect', 'my_plugin_send_404_to_webhook');/**
 * Sends 404 error details to a specified webhook.
 *
 * This function uses a non-blocking POST request to avoid delaying page loads.
 */
function my_plugin_send_404_to_webhook() {
    // Only run this logic on a 404 page
    if ( ! is_404() ) {
        return;
    }

    // Define your webhook URL here for easy management
    $webhook_url = 'https://webhooks.your-url';

    // Gather data for the payload
    $data = [
        'url'        => $_SERVER['REQUEST_URI'],
        'referer'    => isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : 'Direct Access',
        'user_agent' => isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : 'Not Provided',
        'ip_address' => isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : 'Not Provided',
        'timestamp'  => current_time('mysql'),
    ];

    // Arguments for the remote POST request
    $args = [
        'body'        => json_encode($data), // Send data as a JSON string
        'headers'     => [
            'Content-Type' => 'application/json',
        ],
        'timeout'     => 5,  // Don't wait more than 5 seconds
        'blocking'    => false, // Make the request asynchronous (non-blocking)
        'sslverify'   => true, // Recommended to keep true for security
    ];

    // Send the POST request
    wp_remote_post($webhook_url, $args);
}

// Hook into WordPress to run the function
add_action('template_redirect', 'my_plugin_send_404_to_webhook');