Title: Plugin crashes admin dashboard
Last modified: February 26, 2025

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# Plugin crashes admin dashboard

 *  Resolved [lkaufmann](https://wordpress.org/support/users/lkaufmann/)
 * (@lkaufmann)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/)
 * Hey there! I tried installing Filter Everything to create filters alongside ACF.
   However, doing so crashes my WordPress admin dashboard for some reason, and I
   simply can’t find a way to fix it except for removing the plugin using my host’s
   file manager. Both the site and the plugin themselves work fine; The site loads,
   and I can edit pages with Elementor (including adding Filter Everything widgets,
   which seem to work okay), I just can’t access the dashboard as it gives out a“
   There has been a critical error on this website” warning. Activating debug mode
   reveals the following:
 *     ```wp-block-code
       Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /home50/asesorag/public_html/wp-content/plugins/filter-everything/src/Admin/AdminHooks.php:144 Stack trace: #0 /home50/asesorag/public_html/wp-content/plugins/filter-everything/src/Admin/AdminHooks.php(144): in_array('srch', '') #1 /home50/asesorag/public_html/wp-includes/class-wp-hook.php(324): FilterEverything\Filter\AdminHooks->checkForbiddenPrefixes('') #2 /home50/asesorag/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(false, Array) #3 /home50/asesorag/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home50/asesorag/public_html/wp-admin/admin-header.php(303): do_action('admin_notices') #5 /home50/asesorag/public_html/wp-admin/plugins.php(637): require_once('/home50/asesora…') #6 {main} thrown in /home50/asesorag/public_html/wp-content/plugins/filter-everything/src/Admin/AdminHooks.php on line 144
       ```
   
 * Any help? I’m keeping the plugin disabled for now.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fplugin-crashes-admin-dashboard%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Plugin Support [fesupportteam](https://wordpress.org/support/users/fesupportteam/)
 * (@fesupportteam)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18332110)
 * Hi [@lkaufmann](https://wordpress.org/support/users/lkaufmann/)
 * The problem might be because of the VAR names/URL prefixes you’re using for your
   filters. If one of your filter VAR names/URL prefixes is the same as the slug
   that WordPress already uses, it can mess up your admin dashboard.
 * Make sure every filter VAR name/URL prefix is unique. For example, you could 
   use fe_prod_cat for categories, fe_prod_col for colors, fe_prod_size for sizes,
   and so on. Also, you can have some issues with permalinks.
 * If you can use a local server, install the latest version of WordPress with PHP
   version 8.2, a default WordPress theme, and our plugin, then try to recreate 
   this issue. If you succeed, you can send us a step-by-step explanation of how
   you managed to achieve it, so we can review it and fix the problem. As we cannot
   simply recreate it, we tried multiple different options to do so. So it is either
   connected to a certain plugin, theme, or any custom functionality on the site.
 * Best Regards – Victor
 *  Thread Starter [lkaufmann](https://wordpress.org/support/users/lkaufmann/)
 * (@lkaufmann)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18332996)
 * Hey there! Thank you for your reply. I tried it on a local server like you suggested
   and it works perfectly, I simply can’t recreate what happens on my client’s site.
   From what I can see, there are no repeat VARs, permalinks seem to be set up just
   fine, and the theme is Astra, which should be compatible from what I’ve seen.
 * My experience is pretty similar to [@mihailungu](https://wordpress.org/support/users/mihailungu/)‘
   s where it worked just fine on install, I created a test filter (can’t quite 
   remember the specific params), then went to settings, and it crashed. Now no 
   matter how many times I uninstall and re-install, the dashboard simply refuses
   to work when Filter Everything is active. I even temporarily changed the theme
   and uninstalled Astra to check if it was related, but still nothing. Here’s the
   list of plugins on the site just in case:
    - 3CX Live chat
    - ACF
    - ACF: Better Search
    - AirLift
    - Akismet Anti-spam
    - Backuply pro
    - Code snippets
    - Contact form 7
    - Custom post type UI
    - Elementor
    - EA for Elementor
    - GoSMTP Pro
    - Loginizer pro
    - Presto player
    - SiteSEO Pro
    - WP Optimize
 * The site was just handed over to me, so I have no idea if there’s something else
   going on under the hood that caused / is causing this. Is there a leftover file/
   entry somewhere I’m not seeing? Ideally it’d be nice to be able to solve this
   without a fresh install, as I don’t think my client would be very happy to hear
   about it… That and this plugin seems to be THE one for my task, of course.
 *  Plugin Support [fesupportteam](https://wordpress.org/support/users/fesupportteam/)
 * (@fesupportteam)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18334245)
 * Hi [@lkaufmann](https://wordpress.org/support/users/lkaufmann/)
 * There is this function in filter-everything/src/Admin/AdminHooks.php line 137
 *     ```wp-block-code
           public function checkForbiddenPrefixes()    {        $forbiddenPrefixes  = flrt_get_forbidden_prefixes();        $savedPrefixes      = get_option( 'wpc_filter_permalinks', [] );        $warningPrefixes    = [];        foreach( $forbiddenPrefixes as $prefix ){            if( in_array( $prefix, $savedPrefixes ) ){                $warningPrefixes[] = $prefix;            }        }        $permalinkOptionsUrl    = admin_url( 'edit.php?post_type=filter-set&page=filters-settings&tab=prefixes' );        $permalinksTab          = new PermalinksTab();        $permalinksTabLabel     = strtolower( $permalinksTab->getLabel() );        if( ! empty( $warningPrefixes ) ){            $message = wp_kses(                            sprintf(                                _n(                                'Error: <strong>%s</strong> filter prefix is not allowed and must be changed on the Filter %s settings <a href="%s" target="_blank">page</a>. Otherwise this site will not work properly.',                                'Error: following filter prefixes <strong>%s</strong> are not allowed and must be changed on the Filter %s settings <a href="%s" target="_blank">page</a>. Otherwise this site will not work properly.',                                count($warningPrefixes),                                'filter-everything'                                ), implode( ', ', $warningPrefixes ), $permalinksTabLabel, $permalinkOptionsUrl                            ),                            array(                                'strong' => array(),                                'a' => array('href' => true, 'target' => true)                            )                        );            ?>            <div class="notice wpc-error is-dismissible">                <p><?php echo $message; // Already escaped ?></p>            </div>            <?php        }    }
       ```
   
 * And for some reason your site returning a string, which should not be like that.
   What you can do is modify it a bit in the plugin itself via FTP in order to check
   if the data is correct and if not do the var_dump on it to understand what type
   of data you have there that it is working like that.
 * Best Regards,
   Victor
 *  [mihailmc](https://wordpress.org/support/users/mihailungu/)
 * (@mihailungu)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18336295)
 * I fixed it by modifying the AdminHooks.php code, that gaved me access to my admin.
   I deleted the filters i previously created, deactivated the filter everything
   plugin and deleted it. Then reinstalled it to have the orginal AdminHooks.php
   back, and now my admin works. Thank you [@fesupportteam](https://wordpress.org/support/users/fesupportteam/)
   for being so useless.
 * [@lkaufmann](https://wordpress.org/support/users/lkaufmann/) here is the code.
   Replace everything in adminhooks from line 137 to 179 with:
 *     ```wp-block-code
       public function checkForbiddenPrefixes(){    $forbiddenPrefixes  = flrt_get_forbidden_prefixes();    $savedPrefixes      = get_option( 'wpc_filter_permalinks', [] );    // Ensure $savedPrefixes is an array    if (!is_array($savedPrefixes)) {        $savedPrefixes = maybe_unserialize($savedPrefixes);    }    if (!is_array($savedPrefixes)) {        $savedPrefixes = []; // If still not an array, default to an empty array    }    $warningPrefixes = [];    foreach( $forbiddenPrefixes as $prefix ) {        if( in_array( $prefix, $savedPrefixes, true ) ) {            $warningPrefixes[] = $prefix;        }    }    $permalinkOptionsUrl    = admin_url( 'edit.php?post_type=filter-set&page=filters-settings&tab=prefixes' );    $permalinksTab          = new PermalinksTab();    $permalinksTabLabel     = strtolower( $permalinksTab->getLabel() );    if( ! empty( $warningPrefixes ) ){        $message = wp_kses(            sprintf(                _n(                    'Error: <strong>%s</strong> filter prefix is not allowed and must be changed on the Filter %s settings <a href="%s" target="_blank">page</a>. Otherwise this site will not work properly.',                    'Error: following filter prefixes <strong>%s</strong> are not allowed and must be changed on the Filter %s settings <a href="%s" target="_blank">page</a>. Otherwise this site will not work properly.',                    count($warningPrefixes),                    'filter-everything'                ),                implode( ', ', $warningPrefixes ), $permalinksTabLabel, $permalinkOptionsUrl            ),            array(                'strong' => array(),                'a' => array('href' => true, 'target' => true)            )        );        ?>        <div class="notice wpc-error is-dismissible">            <p><?php echo $message; ?></p>        </div>        <?php    }}
       ```
   
 *  Thread Starter [lkaufmann](https://wordpress.org/support/users/lkaufmann/)
 * (@lkaufmann)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18336721)
 * Thank you for the replies! Editing AdminHooks.php and replacing that whole section
   did, in fact, fix the issue. A little out there and I’m still confused as to 
   why it happened, but I’ve been able to create filters just fine now. Cheers, 
   and thank you [@fesupportteam](https://wordpress.org/support/users/fesupportteam/)
   for looking into it!
 *  Plugin Support [fesupportteam](https://wordpress.org/support/users/fesupportteam/)
 * (@fesupportteam)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18337324)
 * Hi [@mihailungu](https://wordpress.org/support/users/mihailungu/)
 * We apologize for our limited ability to assist with such technical issues, we’re
   doing our best to help. Our role lies more in providing support on the plugin
   functionality rather than in-depth development/bugs fixing, as we’re not at the
   level of the plugin developers.
 * This issue has been forwarded to our development team from the first request,
   and they’ve assured us it will be resolved in the next updates.
 * Best Regards – Victor

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘Plugin crashes admin dashboard’ is closed to new replies.

 * ![](https://ps.w.org/filter-everything/assets/icon-256x256.png?rev=3487105)
 * [Filter Everything — WordPress & WooCommerce Filters](https://wordpress.org/plugins/filter-everything/)
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 * 7 replies
 * 3 participants
 * Last reply from: [fesupportteam](https://wordpress.org/support/users/fesupportteam/)
 * Last activity: [1 year, 3 months ago](https://wordpress.org/support/topic/plugin-crashes-admin-dashboard/#post-18337324)
 * Status: resolved