Fatal Error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array

[ds106dc]

Seeing this error in 2 FeedWordPress sites I manage and google says I am not alone

This occurs on an attempt to update:

Updating WildDS106 - Connecting is Learning from
<https://connectingislearning.com/tag/wildds106/rss/> ...
Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array,
WpOrg\Requests\Utility\CaseInsensitiveDictionary given in
/home/fabergla/combobulating.net/wp-includes/SimplePie/src/File.php:373 Stack trace: #0
/home/fabergla/combobulating.net/wp-includes/SimplePie/src/File.php(373):
array_map(Object(Closure), Object(WpOrg\Requests\Utility\CaseInsensitiveDictionary)) #1
/home/fabergla/combobulating.net/wp-includes/SimplePie/src/File.php(327):
SimplePie\File->maybe_update_headers() #2
/home/fabergla/combobulating.net/wp-includes/SimplePie/src/SimplePie.php(2093):
SimplePie\File->get_headers() #3
/home/fabergla/combobulating.net/wp-includes/SimplePie/src/SimplePie.php(1734):
SimplePie\SimplePie->fetch_data(Object(SimplePie\Cache\BaseDataCache)) #4
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/feedwordpress.php(2019):
SimplePie\SimplePie->init() #5
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/syndicatedlink.class.php(100):
FeedWordPress::fetch(Object(SyndicatedLink), Array) #6
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/syndicatedlink.class.php(139):
SyndicatedLink->fetch() #7
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/feedwordpress.php(918):
SyndicatedLink->poll(NULL) #8
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/feedwordpresssyndicationpage.
class.php(1358): FeedWordPress->update(NULL, NULL) #9
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/feedwordpresssyndicationpage.
class.php(1425): fwp_dashboard_update_if_requested(Object(FeedWordPressSyndicationPage)) #10
/home/fabergla/combobulating.net/wp-admin/includes/template.php(1453):
fwp_syndication_manage_page_update_box(Object(FeedWordPressSyndicationPage), Array) #11
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/feedwordpresssyndicationpage.
class.php(592): do_meta_boxes(Object(WP_Screen), 'feedwordpresssy...',
Object(FeedWordPressSyndicationPage)) #12
/home/fabergla/combobulating.net/wp-content/plugins/feedwordpress/syndication.php(5):
FeedWordPressSyndicationPage->display() #13
/home/fabergla/combobulating.net/wp-admin/admin.php(298): include('/home/fabergla/...') #14 {main}
thrown in /home/fabergla/combobulating.net/wp-includes/SimplePie/src/File.php on line 373

Not that I rely on Google's Ai but this sounds plausible:

The error "Argument #2 ($array) must be of type array, WpOrg\Requests\Utility\CaseInsensitiveDictionary given" occurs in WordPress due to a type incompatibility between the older SimplePie library (used for RSS feeds) and the newer Requests library (used for HTTP requests), specifically in newer PHP versions.
The SimplePie\File->maybe_update_headers() function expects an array for its second argument, but it receives a WpOrg\Requests\Utility\CaseInsensitiveDictionary object from the Requests library, which PHP no longer automatically coerces into an array, causing a fatal TypeError

Is there even at least a quick fix one can do? Thanks

[glg222]

Hi,

In version 2024.1119, in the file
feedwordpress/extend/SimplePie/feedwordpie_file.class.php

I replaced lines 99 to 106 with the following ones:

if ( is_wp_error( $res ) ) :
$this->error = 'WP HTTP Error: ' . $res->get_error_message();
$this->success = false;
else :
$raw_headers = wp_remote_retrieve_headers( $res );
$this->headers = array();
$this->body = wp_remote_retrieve_body( $res );
$this->status_code = wp_remote_retrieve_response_code( $res );
endif;

I don’t know if this is the best solution, but this works fine now.

[cogdog]

Thanks (replying from my regular account), that worked perfectly. My site is back syndicating. Maybe PR it? The plugin is dead otherwise.

[froomkin]

I'm sorry to bother you, but the lines with those numbers in my version of the plugiin don't make any sense to overwrite in this way. (Starts with the last line of stars under comment "core dependencies and plugins".) Would it be possible please for you to send me the full text of the revised plugin and I'll try it out on my test site? Thanks! -Michael

…

On Mon, Dec 8, 2025 at 10:43 AM glg222 ***@***.***> wrote: *CAUTION:* This email originated from outside the organization. *DO NOT CLICK ON LINKS* *or* *OPEN ATTACHMENTS* unless you know and trust the sender. *glg222* left a comment (radgeek/feedwordpress#164) <#164 (comment)> Hi, In version 2024.1119, in the file feedwordpress/extend/SimplePie/feedwordpie_file.class.php I replaced lines 99 to 106 with the following ones: if ( is_wp_error( $res ) ) : $this->error = 'WP HTTP Error: ' . $res->get_error_message(); $this->success = false; else : $raw_headers = wp_remote_retrieve_headers( $res ); $this->headers = array(); $this->body = wp_remote_retrieve_body( $res ); $this->status_code = wp_remote_retrieve_response_code( $res ); endif; I don’t know if this is the best solution, but this works fine now. — Reply to this email directly, view it on GitHub <#164 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABL4JVFHRDQC34VKIEV6IUT4AWMBLAVCNFSM6AAAAACOMME3M6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMRXGU3TKMZSG4> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

-- A. Michael Froomkin | +1 (305) 753-2900 (cell) Laurie Silvers & Mitchell Rubenstein Distinguished Professor of Law Editor in Chief, Jotwell, The Journal of Things We Like (Lots) http://www.law.tm Bluesky: @mfroomkin.bsky.social U. Miami School of Law, P.O. Box 248087, Coral Gables, FL 33124 USA -->It's hot here.<--

[cogdog]

Hi Michael,

You are looking at the wrong file, you do not edit the main plugin file. The change is a separate file internal file within the plugin directory

     feedwordpress/extend/SimplePie/feedwordpie_file.class.php

Just to be safe, I commented out the lines referenced:

			// fix for simple pie error ref https://github.com/radgeek/feedwordpress/issues/164#issuecomment-3627575327

			/*
			if ( is_wp_error( $res ) ) :
				$this->error   = 'WP HTTP Error: ' . $res->get_error_message();
				$this->success = false;
			else :
				$this->headers     = wp_remote_retrieve_headers( $res );
				$this->body        = wp_remote_retrieve_body( $res );
				$this->status_code = wp_remote_retrieve_response_code( $res );
			endif;
			*/

and added below this the suggested replacement ones

			if ( is_wp_error( $res ) ) :
				$this->error = 'WP HTTP Error: ' . $res->get_error_message();
				$this->success = false;
			else :
				$raw_headers = wp_remote_retrieve_headers( $res );
				$this->headers = array();
				$this->body = wp_remote_retrieve_body( $res );
				$this->status_code = wp_remote_retrieve_response_code( $res );
			endif;

[glg222]

Hi Michael,
To be more precise,

I’m using FeedWordPress version 2024.1119 (the latest version available in the WordPress plugin repository).
The change was made in the following file:
feedwordpress/extend/SimplePie/feedwordpie_file.class.php

The issue was caused by $this->headers receiving the HTTP headers, which FeedWordPress doesn’t actually use and sometimes can’t handle correctly.

I just want to clarify that in my previous attempt, I added the line:
$raw_headers = wp_remote_retrieve_headers($res);
This was mainly to show that I considered the headers, which might help for debugging or future use, but it is not actually necessary for the fix.

The key change is simply to replace:

$this->headers = wp_remote_retrieve_headers($res);

with

$this->headers = array();

With this change, the feeds now work correctly on my site without any issues related to headers.

[froomkin]

many thanks. will test after work today. Again, thanks! -mf

…

On Mon, Dec 8, 2025 at 12:18 PM glg222 ***@***.***> wrote: *CAUTION:* This email originated from outside the organization. *DO NOT CLICK ON LINKS* *or* *OPEN ATTACHMENTS* unless you know and trust the sender. *glg222* left a comment (radgeek/feedwordpress#164) <#164 (comment)> Hi Michael, To be more precise, I’m using FeedWordPress version 2024.1119 (the latest version available in the WordPress plugin repository). The change was made in the following file: feedwordpress/extend/SimplePie/feedwordpie_file.class.php The issue was caused by $this->headers receiving the HTTP headers, which FeedWordPress doesn’t actually use and sometimes can’t handle correctly. I just want to clarify that in my previous attempt, I added the line: $raw_headers = wp_remote_retrieve_headers($res); This was mainly to show that I considered the headers, which might help for debugging or future use, but it is not actually necessary for the fix. The key change is simply to replace: $this->headers = wp_remote_retrieve_headers($res); with $this->headers = array(); With this change, the feeds now work correctly on my site without any issues related to headers. — Reply to this email directly, view it on GitHub <#164 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABL4JVDNX5EUAUJLH5LSQN34AWXG3AVCNFSM6AAAAACOMME3M6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMRYGEZTCNZZHA> . You are receiving this because you commented.Message ID: ***@***.***>

-- A. Michael Froomkin | +1 (305) 753-2900 (cell) Laurie Silvers & Mitchell Rubenstein Distinguished Professor of Law Editor in Chief, Jotwell, The Journal of Things We Like (Lots) http://www.law.tm Bluesky: @mfroomkin.bsky.social U. Miami School of Law, P.O. Box 248087, Coral Gables, FL 33124 USA -->It's hot here.<--