Using get_current_network_id to get network ID in WordPress

The get_current_network_id function in WordPress is primarily designed to retrieve the ID of the current network. In a WordPress Multisite environment, multiple websites or blogs can be managed under a single WordPress installation. Each of these websites or blogs is treated as a network. The get_current_network_id function plays a significant role in this environment by identifying the network that is currently being interacted with, based on the ID of that network.

This function can be particularly beneficial when it is necessary to perform actions or retrieve data specific to the current network. By using the get_current_network_id function, it becomes possible to identify and interact with the correct network within the multisite setup. This could include retrieving network-specific settings, displaying network-specific content, or performing network-specific operations.

However, it’s important to note that in a standard, single-site WordPress installation, this function will simply return the ID of the main site, as there are no additional networks to identify.

Parameters

The get_current_network_id function in WordPress does not accept any parameters.

Return Value

This function, when called, will return an integer value representing the ID of the current network.

Examples

How to Display Current Network ID in a WordPress Multisite

function display_current_network_id() {
 $network_id = get_current_network_id();
 echo '<p>Current Network ID: ' . $network_id . '</p>';
}
add_action('wp_footer', 'display_current_network_id');

This code snippet displays the current network ID in the footer of your WordPress site. The get_current_network_id() function retrieves the network ID, which is then echoed out inside a paragraph tag. The function is hooked into the wp_footer action, so it runs in the footer of the site.

How to Check if Current Network ID Matches a Specific Value

function check_network_id() {
 $network_id = get_current_network_id();
 if ($network_id == 1) {
 echo '<p>You are viewing the main network.</p>';
 } else {
 echo '<p>You are not viewing the main network.</p>';
 }
}
add_action('wp_footer', 'check_network_id');

This code snippet checks if the current network ID matches a specific value (in this case, 1). If the network ID is 1, it means you are viewing the main network, otherwise, you are not. The result is displayed in the footer of the site.

How to Use Current Network ID in a Switch Statement

function switch_network() {
 $network_id = get_current_network_id();
 switch ($network_id) {
 case 1:
 echo '<p>You are viewing Network 1.</p>';
 break;
 case 2:
 echo '<p>You are viewing Network 2.</p>';
 break;
 default:
 echo '<p>You are viewing a network other than Network 1 or Network 2.</p>';
 }
}
add_action('wp_footer', 'switch_network');

This code snippet uses a switch statement to check the current network ID and display a message based on its value. If the network ID is 1, it displays a message that you are viewing Network 1. If the network ID is 2, it displays a message that you are viewing Network 2. If the network ID is neither 1 nor 2, it displays a message that you are viewing a network other than Network 1 or Network 2. The result is displayed in the footer of the site.

Conclusion

The get_current_network_id function is a feature that retrieves the current network ID in a multisite installation. It is primarily used for determining the network ID of the site that a user is currently viewing, which is essential for properly routing data and requests in a multisite environment. With this function, developers can identify the network of the active site and use this information to tailor the behavior of their plugins or themes to the specific network.

Related WordPress Functions

in WordPress Functions