do_action(‘rss2_head’) with PHP 8.1

  • There is problem witch do_action(‘rss2_head’) on website with PHP 8.1. There is error:

    Fatal error: Uncaught TypeError: call_user_func_array(): Argument 
#1 ($callback) must be a valid callback, function "" not found or invalid function name in /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php:310 Stack trace: 

#0 /data/web/virtuals/109058/virtual/www/wp-includes/plugin.php(205): WP_Hook->apply_filters('<generator>http...', Array) 
#1 /data/web/virtuals/109058/virtual/www/wp-includes/general-template.php(4965): apply_filters('the_generator', '<generator>http...', '') 
#2 /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php(308): the_generator('') 
#3 /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) 
#4 /data/web/virtuals/109058/virtual/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 
#5 /data/web/virtuals/109058/virtual/www/wp-content/themes/Dotekomanie3/rss-feedrecenze.php(48): do_action('rss2_head') 
#6 /data/web/virtuals/109058/virtual/www/wp-includes/template.php(785): require('/data/web/virtu...') 
#7 /data/web/virtuals/109058/virtual/www/wp-includes/template.php(718): load_template('/data/web/virtu...', false, Array) 
#8 /data/web/virtuals/109058/virtual/www/wp-includes/general-template.php(204): locate_template(Array, true, false, Array) 
#9 /data/web/virtuals/109058/virtual/www/wp-content/themes/Dotekomanie3/inc/core-functions.php(162): get_template_part('rss-feedrecenze', 'feedrecenze') 
#10 /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php(308): customRSSFuncrecenze(false, 'feedrecenze') 
#11 /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) 
#12 /data/web/virtuals/109058/virtual/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 
#13 /data/web/virtuals/109058/virtual/www/wp-includes/functions.php(1621): do_action('do_feed_feedrec...', false, 'feedrecenze') 
#14 /data/web/virtuals/109058/virtual/www/wp-includes/template-loader.php(48): do_feed() 
#15 /data/web/virtuals/109058/virtual/www/wp-blog-header.php(19): require_once('/data/web/virtu...') 
#16 /data/web/virtuals/109058/virtual/www/index.php(17): require('/data/web/virtu...') 
#17 {main} thrown in /data/web/virtuals/109058/virtual/www/wp-includes/class-wp-hook.php on line 310
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  • Hi there,

    Most likely there is probably the plugin or theme incompatible with the PHP 8.1. First, I would highly suggest you to update all of your plugins or theme. If you still see the error, deactivate one by one to identify the conflicting plugin or change the theme to the WordPress default theme.

    I suggest doing this test on a staging site, or if you don’t have one make sure to have a full backup of your live installation before proceeding with the test.

    I hope this helps!

Viewing 1 replies (of 1 total)
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