Using WordPress ‘get_mu_plugins()’ PHP function

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The get_mu_plugins() WordPress PHP function checks the mu-plugins directory and retrieves all mu-plugin files with any plugin data.

Usage

$mu_plugins = get_mu_plugins();

Parameters

  • None

More information

See WordPress Developer Resources: get_mu_plugins()

Examples

Display a list of active mu-plugins

This example retrieves the list of active mu-plugins and displays their names and versions.

// Retrieve the mu-plugins
$mu_plugins = get_mu_plugins();

// Loop through the mu-plugins and display their names and versions
foreach ($mu_plugins as $plugin) {
    echo 'Plugin Name: ' . $plugin['Name'] . ', Version: ' . $plugin['Version'] . '<br>';
}

Check if a specific mu-plugin is active

This example checks if a specific mu-plugin named “Custom MU-Plugin” is active.

// Retrieve the mu-plugins
$mu_plugins = get_mu_plugins();

// Check if the specific mu-plugin is active
$plugin_name = 'Custom MU-Plugin';
$is_plugin_active = array_key_exists($plugin_name, $mu_plugins);

// Display the result
echo $is_plugin_active ? "The plugin is active." : "The plugin is not active.";

Get the total number of active mu-plugins

This example retrieves the total number of active mu-plugins.

// Retrieve the mu-plugins
$mu_plugins = get_mu_plugins();

// Get the total number of active mu-plugins
$total_plugins = count($mu_plugins);

// Display the result
echo 'Total active mu-plugins: ' . $total_plugins;

Retrieve mu-plugin data by a specific key

This example retrieves the mu-plugin data by a specific key, such as “Version” or “Author”.

// Retrieve the mu-plugins
$mu_plugins = get_mu_plugins();

// Get mu-plugin data by a specific key
$key = 'Version';
$data = array_map(function($plugin) use ($key) {
    return $plugin[$key];
}, $mu_plugins);

// Display the result
print_r($data);

Filter mu-plugins by a specific author

This example filters the mu-plugins by a specific author and displays their names.

// Retrieve the mu-plugins
$mu_plugins = get_mu_plugins();

// Filter mu-plugins by a specific author
$author = 'John Doe';
$filtered_plugins = array_filter($mu_plugins, function($plugin) use ($author) {
    return $plugin['Author'] === $author;
});

// Display the filtered mu-plugins
foreach ($filtered_plugins as $plugin) {
    echo 'Plugin Name: ' . $plugin['Name'] . '<br>';
}