Option 1: Use predefined rules

1. Go to WooCommerce > Settings > Shipping and select your shipping zone.
2. Configure:
   • A Free Shipping method with a minimum order of 60 euros.
   • A Flat Rate Shipping method with a base cost of 5 euros.
3. While WooCommerce may not automatically hide the flat rate, customers will be able to choose free shipping when eligible.

Option 2: Use custom code

Add this code to your functions.php file to automatically hide other shipping methods when free shipping is available:

Final Step

• Save your changes and refresh the checkout page to test

The post The option “Hide other shipping methods when free shipping is available” is not displayed appeared first on CNERIS.

Solution: To increase the inotify watches limit, follow these steps:

1. Open a terminal and check the current value with:
   cat /proc/sys/fs/inotify/max_user_watches

2. Temporarily increase the value (e.g., to 524288) by running:
   sudo sysctl fs.inotify.max_user_watches=524288

3. To make the change permanent, edit the /etc/sysctl.conf file:
   sudo nano /etc/sysctl.conf

4. Add this line at the end of the file:
   fs.inotify.max_user_watches=524288

5. Save the file and apply the change with:
   sudo sysctl -p


After these steps, the system should allow more inotify watchers, and the error should no longer appear.

The post Error: Terminating since out of inotify watches. Consider increasing /proc/sys/fs/inotify/max_user_watches appeared first on CNERIS.

• Install a system information plugin
  Go to the WordPress admin panel, select Plugins > Add New, and search for plugins like Site Health, WP-ServerInfo, or Query Monitor.
• Use “Site Health”
  WordPress includes a Site Health tool under Tools > Site Health. Here, you can view server environment details such as PHP version, memory limit, and maximum execution time.
• View additional details
  For more specific information, you can install WP-ServerInfo. This plugin shows data about the server, such as MySQL version, CPU usage, RAM, and more.

The post In the WordPress administration panel, how can I see the server’s performance? appeared first on CNERIS.

1. Locate the session_start() code
   Search your theme or active plugins for the session_start() function. It may be in the theme’s functions.php file or in a custom plugin.
2. Add session_write_close() after session_start()
   Ensure session_write_close() is called after each session_start() call, before making any HTTP requests. This will close the session and allow the REST API to work correctly. For example:
   session_start();
// Your code here
session_write_close();

3. Use the init hook in WordPress
   If session_start() needs to be in functions.php, make sure to wrap it in the init hook and use session_write_close() like this:
   add_action('init', function() {
if (!session_id()) {
session_start();
session_write_close();
}
});

The post A PHP session was created by a session_start() function call. This interferes with REST API and loopback requests. The session should be closed by session_write_close() before making any HTTP requests. appeared first on CNERIS.

Code to Assign Default Featured Image by Category

1. Open your theme’s functions.php file (preferably a child theme to avoid losing changes with updates).
2. Add the following code, replacing the URLs with your default images for each category:

function set_default_thumbnail($post_id) {
if (has_post_thumbnail($post_id)) {
return;
}

// Define default images for each category
$default_images = [
‘category-1’ => ‘https://your-site.com/wp-content/uploads/category-image1.jpg’,
‘category-2’ => ‘https://your-site.com/wp-content/uploads/category-image2.jpg’,
‘category-3’ => ‘https://your-site.com/wp-content/uploads/category-image3.jpg’,
];

// Get post categories
$categories = get_the_category($post_id);

// Check if categories are assigned and find a matching default image
foreach ($categories as $category) {
if (array_key_exists($category->slug, $default_images)) {
$image_url = $default_images[$category->slug];

// Download image and set as featured image
$image_id = attach_image_from_url($image_url, $post_id);
if ($image_id) {
set_post_thumbnail($post_id, $image_id);
}
break;
}
}
}
add_action(‘save_post’, ‘set_default_thumbnail’);

// Function to download and attach the image to the post
function attach_image_from_url($image_url, $post_id) {
$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($image_url);

if (wp_mkdir_p($upload_dir[‘path’])) {
$file = $upload_dir[‘path’] . ‘/’ . $filename;
} else {
$file = $upload_dir[‘basedir’] . ‘/’ . $filename;
}

file_put_contents($file, $image_data);

$wp_filetype = wp_check_filetype($filename, null);
$attachment = [
‘post_mime_type’ => $wp_filetype[‘type’],
‘post_title’ => sanitize_file_name($filename),
‘post_content’ => ”,
‘post_status’ => ‘inherit’
];

$attach_id = wp_insert_attachment($attachment, $file, $post_id);
require_once(ABSPATH . ‘wp-admin/includes/image.php’);
$attach_data = wp_generate_attachment_metadata($attach_id, $file);
wp_update_attachment_metadata($attach_id, $attach_data);

return $attach_id;
}

Code Explanation

• $default_images: Defines default images for each category using the category slug as the key and the image URL as the value.
• set_default_thumbnail: This function runs when a post is saved. If the post has no featured image, it finds the first category with a default image in $default_images and sets it as the featured image.
• attach_image_from_url: This function downloads the image from the URL and attaches it to the post as a media file, making it the featured image.

This code will automatically assign a default featured image for new or edited posts based on their category.

Note: Make sure to test this code in a development environment before implementing it on your live site, and replace the example URLs with your actual default image URLs.

The post How you can set a default featured image for each post category appeared first on CNERIS.

1. FIM (Framebuffer Image Viewer)

• FIM is a command-line image viewer that utilizes the framebuffer to display images directly in the terminal.
• Installation:
  sudo apt install fim

• Usage:
  fim image.jpg

• Example: Run fim /path/to/image.jpg to open an image in the terminal. FIM allows navigation through multiple images in a folder with arrow keys.

2. VIU

• Viu is another lightweight image viewer for the terminal, compatible with color images in most terminals.
• Installation (requires cargo from Rust):
  cargo install viu

• Usage:
  viu image.jpg

• Example: Run viu /path/to/image.jpg for a quick view. Viu is great for 24-bit color terminals.

3. Catimg

• Catimg converts images into ASCII format to display in the terminal.
• Installation:
  sudo apt install catimg

• Usage:
  catimg image.jpg

• Example: Run catimg /path/to/image.jpg to view an ASCII representation of the image.

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1. Access the wp-config.php file located in the root directory of your WordPress installation.
2. Look for the following lines:
   php

   Copiar código

   define('DB_CHARSET', 'utf8mb4');
define('DB_COLLATE', '');

3. If these lines are missing or set to a different value, change DB_CHARSET to utf8mb4, which is the recommended character set for supporting special characters, including Chinese. DB_COLLATE should be left empty or set to utf8mb4_unicode_ci if you want to specify a collation.
4. Save the changes and upload the file back to the server if you are working locally.

With this change, WordPress will be configured to use the UTF-8 character set, ensuring that special characters, such as Chinese, display correctly.

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The post Steps to Convert the Database from utf8 to utf8mb4 in MySQL appeared first on CNERIS.

1. Edit the wp-config.php file:
   • Access the wp-config.php file in your WordPress installation.
   • Add the following line of code before the line that says “/* That’s all, stop editing! */”:
     define('WP_MEMORY_LIMIT', '256M');


   This sets the memory limit to 256 MB. You can adjust the value depending on your needs, such as 128M or 512M.

2. Edit php.ini (optional):
   • If you have access to the php.ini file on your server, find the line:
     memory_limit = 128M

   • Change the value to a higher one, like 256M or more, according to your requirements.
3. Restart the server:
   • After making the changes, if you modified the php.ini file, you need to restart the server for the changes to take effect.

The post How to increase the memory limit in WordPress (wp_max_memory_limit)? appeared first on CNERIS.

1. Database issues: If your server relies on a database (like MySQL or MariaDB), slow or unoptimized queries can delay response generation. Ensure that tables are properly indexed and that there are no queries taking too long to execute.
2. Server performance: If your server is underperforming (CPU overload, low RAM, or high disk usage), request processing will be slower. Check resource usage using tools like top or htop to identify bottlenecks.
3. Web server configuration: If your web server (such as Apache or Nginx) is not optimized, it could cause delays. Reviewing configurations like output compression (Gzip), caching usage, and concurrent connection parameters can help improve TTFB.
4. Slow connection to external networks: If your server relies on external services (APIs, data sources) or is located in a data center far from your users, network latency can increase the TTFB.
5. Caching: If caching is not properly used, every request needs to be processed from scratch. Setting up appropriate caching on the server can significantly reduce TTFB.

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