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Opened 3 years ago

Last modified 3 years ago

#53395 new defect (bug)

Cannot use wp_is_mobile() in Network activated plugins

Reported by: promz's profile promz Owned by:
Milestone: Awaiting Review Priority: normal
Severity: normal Version:
Component: Plugins Keywords:
Focuses: multisite Cc:


Steps to reproduce

  • Create a network site
  • Create and activate a simple custom plugin, use wp_is_mobile() function anywhere in that plugin
  • Login to the network dashboard and then activate the plugin

You will see an error:

Uncaught Error: Call to undefined function wp_is_mobile()

Looking at the source code of wp_is_mobile(), I can't see anything that would prevent it from loading earlier. Maybe it should be loaded earlier?

Change History (1)

#1 @SergeyBiryukov
3 years ago

  • Component changed from General to Plugins
  • Focuses multisite added

Hi there, welcome back to WordPress Trac! Thanks for the report.

wp_is_mobile() is located in wp-includes/vars.php, which is indeed loaded later than most other PHP files in wp-settings.php.

That said, it is considered a best practice in WordPress not to run any code directly on plugin inclusion, as the environment is not fully initialized yet, and run on the appropriate action instead, e.g. plugins_loaded or init.

Moving the wp_is_mobile() call in your plugin to a function or method that runs on a specific action should resolve the issue here.

Version 1, edited 3 years ago by SergeyBiryukov (previous) (next) (diff)
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