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Check if the current visitor is a developer by using their IP address or their WordPress user email domain (if they are logged in).

PHP April 27, 2017




(Optional) (Boolean) User must be logged in
Default: false

Parameter Notes

Passing $strict as true bypasses the IP address condition and requires the user to be logged in and a developer.

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<?php if ( is_dev() ){
    //Something for developers only.
} ?>

Additional Notes

Developers and clients IP addresses and email domains can be added in Nebula Options under the Administration tab.

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    Source File

    Located in /libs/Utilities/Utilities.php on line 188.

    1 Hook

    Find these filters and actions in the source code below to hook into them. Use do_action() and add_filter() in your functions file or plugin.

    Need a new filter hook? Request one here.

    This function has no action hooks available. Request one?

            public function is_dev($strict=false){
                $override = apply_filters('pre_is_dev', null, $strict);
                if ( isset($override) ){return $override;}
                if ( empty($strict) ){
                    $dev_ips = ( !empty($this->get_option('dev_ip')) )? $this->get_option('dev_ip') : '';
                    $dev_ips = explode(',', $dev_ips);
                    if ( !empty($dev_ips) ){
                        foreach ( $dev_ips as $dev_ip ){
                            $dev_ip = wp_privacy_anonymize_ip(trim($dev_ip));
                            if ( !empty($dev_ip) && $dev_ip[0] !== '/' && $dev_ip === $this->get_ip_address() ){
                                return true;
                            if ( !empty($dev_ip) && $dev_ip[0] === '/' && preg_match($dev_ip, $this->get_ip_address()) ){
                                return true;
                //Check if the current user's email domain matches any of the dev email domains from Nebula Options
                if ( is_user_logged_in() ){
                    $current_user = wp_get_current_user();
                    if ( !empty($current_user->user_email) ){
                        $current_user_domain = explode('@', $current_user->user_email)[1];
                        $dev_email_domains = ( $this->get_option('dev_email_domain') )? $this->get_option('dev_email_domain') : ''; //Ensure correct type
                        $dev_email_domains = explode(',', $dev_email_domains);
                        foreach ( $dev_email_domains as $dev_email_domain ){
                            if ( trim($dev_email_domain) === $current_user_domain ){
                                return true;
                return false;


    To override this PHP function, use this hook in your child theme or plugin ("my_custom" can be changed):

    add_filter('pre_is_dev', 'my_custom_is_dev', 10, 2); //The last integer must be 1 more than the actual parameters
    function my_custom_is_dev($null, $strict){ //$null is required, but can be ignored
        //Write your own code here
        return true; //Return true to prevent the original function from running afterwords

    You can completely disable this PHP function with a single line actions:

     add_filter('pre_is_dev', '__return_false');