Error discovered when using the pagination numbers
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Please note during debugging I may or may not have wpmathpub enabled or not.
Using WordPress version = 6.8.2 wpmathpub version = 2.0.4
While I have wpmathpub enabled I found that when I go to baseURL/page/263 there would be no pagination numbers at the bottom of the page. Thus I coerced things by modifying the URL = baseURL/page/264. When I hit enter a blank page was returned and the error below was served. I then entered URL = baseURL/page/265 and it served a regular page up.
The error returned from entering / hitting return on URL = baseURL/page/264 was
: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in
/home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php:1050
Stack trace: 0 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1005): expression_math->dessine_expression(9.6) 1 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1232): expression_math->dessine(9.6) 2 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(967): expression_math->dessine_grandoperateur(’12’, ‘_integrale’) 3 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1020): expression_math->dessine(’12’) 4 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1005): expression_math->dessine_expression(’12’) 5 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1673): expression_math->dessine(’12’) 6 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php(1704): mathimage(‘int{}{}{E circ …’, ’12’, ‘https://www.ama…’) 7 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/wpmathpub.php(118): mathfilter(‘ int{}{}{E c…’, ’12’, ‘https://www.ama…’) 8 [internal function]: wpmathfilter(Array) 9 /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/wpmathpub.php(132): preg_replace_callback(‘#\[pmath(\s+siz…’, ‘wpmathfilter’, ‘\r\n\t\xC3\xA2\xE2\x82\xAC\xE2\x80\xB9<…’) 10 /home/politico/amarketplaceofideas.com/wp-includes/class-wp-hook.php(324): to_phpmath(‘
\r\n\t\xC3\xA2\xE2\x82\xAC\xE2\x80\xB9<…’) 11 /home/politico/amarketplaceofideas.com/wp-includes/plugin.php(205): WP_Hook->apply_filters(‘
\r\n\t\xC3\xA2\xE2\x82\xAC\xE2\x80\xB9<…’, Array) 12 /home/politico/amarketplaceofideas.com/wp-content/themes/default/inc/views/blog/class-hestia-blog-post-layout.php(281): apply_filters(‘the_content’, ‘
\r\n\t\xC3\xA2\xE2\x82\xAC\xE2\x80\xB9<…’) 13 /home/politico/amarketplaceofideas.com/wp-content/themes/default/inc/views/blog/class-hestia-blog-post-layout.php(249): Hestia_Blog_Post_Layout->get_post_content() 14 /home/politico/amarketplaceofideas.com/wp-content/themes/default/inc/views/blog/class-hestia-blog-post-layout.php(220): Hestia_Blog_Post_Layout->get_theme_excerpt(‘default’) 15 /home/politico/amarketplaceofideas.com/wp-content/themes/default/inc/views/blog/class-hestia-blog-post-layout.php(66): Hestia_Blog_Post_Layout->render_post_body() 16 /home/politico/amarketplaceofideas.com/wp-content/themes/default/inc/views/blog/class-hestia-blog-post-layout.php(44): Hestia_Blog_Post_Layout->get_article(Array) 17 /home/politico/amarketplaceofideas.com/wp-includes/class-wp-hook.php(324): Hestia_Blog_Post_Layout->render(‘default’) 18 /home/politico/amarketplaceofideas.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) 19 /home/politico/amarketplaceofideas.com/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 20 /home/politico/amarketplaceofideas.com/wp-content/themes/default/template-parts/content.php(12): do_action(‘hestia_blog_pos…’, ‘default’) 21 /home/politico/amarketplaceofideas.com/wp-includes/template.php(812): require(‘/home/politico/…’) 22 /home/politico/amarketplaceofideas.com/wp-includes/template.php(745): load_template(‘/home/politico/…’, false, Array) 23 /home/politico/amarketplaceofideas.com/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) 24 /home/politico/amarketplaceofideas.com/wp-content/themes/default/index.php(66): get_template_part(‘template-parts/…’) 25 /home/politico/amarketplaceofideas.com/wp-includes/template-loader.php(106): include(‘/home/politico/…’) 26 /home/politico/amarketplaceofideas.com/wp-blog-header.php(19): require_once(‘/home/politico/…’) 27 /home/politico/amarketplaceofideas.com/index.php(17): require(‘/home/politico/…’) 28 {main} thrown in /home/politico/amarketplaceofideas.com/wp-content/plugins/wpmathpub/phpmathpublisher/mathpublisher.php on line 1050
The page I need help with: [log in to see the link]
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I figured out a test case that creates the dreaded error on line 1055. And implemented a solution both in phpmathpublisher as reported by your [and mine] error_log. The fix catches the error and silently skips the equation all together. Then from my test case, I implemented a test within my own wpmathpub code so the error never gets to phpmathpub along with a “friendly” error message within the blog post itself where the pmath tag is located. Then, once the error was removed, I found a smaller error that does not crash the plugin but reports a one line every time it is called. I fixed that too.
Now you can see my live test case in action on the last private test page on my site:
November 25, 2025Protected: wpmathpub tech support review 2025_11_25_b
Filed under: Electronic Components — Tags: wpmathpub — Ron Fredericks @ 6:09 pm Edit This
Try to break wpmathpub
Dollar test
Blank tag now handled by an empty shortcode error message Error: wpmathpub plugin shortcode cannot be empty
Tag with HTML entities test
The code in html editor that generates the test case above looks like this:
Try to break wpmathpub
Dollar test [pmath]$0.00[/pmath]
Blank tag now handled by an empty shortcode error message [pmath][/pmath]
Tag with HTML entities test [pmath size=24]html://www.embeddedcomponents.com[/pmath]Next, in a few hours, I will email you a zip file with a repaired wpmathpub plugin. If you can, install the emailed zip file and see if your error [an unknown test case] goes away.
I will give it a whirl as soon after it shows up.
Note: when i was yammering about $ symbol being used in a WP post I was talking about the unrelated problem of the following:
Random jibber jabber for $5
If I put that phrase in bold above in a WP entry then save it off and take a look the entry – it will be all discombobulated. This always happens. It’s not part time. It is full time.
I did not mean to distract with that. It was mentioned in context of wpmathpub only in the sense that for a little bit I thought maybe I had a strange combination of characters that was breaking wpmathpub. I suppose maybe that is the case but only in the sense that it’s feeding a null string to something important in wpmathpub in fairly rare instances.
I did notice one thing. When I activate wpmathpub I get the following error message:
Deprecated: Function has_cap was called with an argument that is deprecated since version 2.0.0! Usage of user levels is deprecated. Use capabilities instead. in /home/politico/amarketplaceofideas.com/wp-includes/functions.php on line 6131
Next I disabled all plugins. Then enabled ONLY wpmathpub. Still came back with a double flagging of the following error
Deprecated: Function has_cap was called with an argument that is deprecated since version 2.0.0! Usage of user levels is deprecated. Use capabilities instead. in /home/politico/amarketplaceofideas.com/wp-includes/functions.php on line 6131
Still using a different theme than you. Is that the only thing that could be different between my setup and yours if I disable all other plugins?
I use thse two files to debug / develop my plugin. Download the plugin to your PC then find the two php files in my code (root and phpmathpublisher directories):
- I use free version FileZilla to FTP upload/download/view between local and WordPress server: https://filezilla-project.org/download.php
- I use free version of VSCode for editing PHP and other web files: https://code.visualstudio.com
Bonus: Link to creating and using the simplest wordpress plugin at 2:27 in this short video: https://www.youtube.com/watch?v=MW-evyl4nQU&t=222s
You are a great software testing superstar! I don’t see any errors in my error_log but I did find this call that ultimately could generate an error via on_cap in functions.php:
// action function for above hook
function mt_add_pages() {
// Add a new submenu under Manage:
// add_management_page('WPMathPub', 'WPMathPub', 8, 'wpmathpubmanage', 'wpmathpub_manage_page');
add_management_page('WPMathPub', 'WPMathPub', 'manage_options', 'wpmathpubmanage', 'wpmathpub_manage_page');
}Here is a link to download a new beta (same as old link):
https://www.biophysicslab.com/download/wpmathpub-wordpress-plugin-latest-beta
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