Cannot activate a plugin which overrides pluggable function

[superpoincare]

Trying to activate a plugin with a function with the same name as in wp-includes/pluggable.php gives a fatal error and doesn't activate it.

This probably happens because during the activation process, the pluggable.php file loads earlier. In a normal loading process, the plugin would load earlier and not give this error.

The same plugin would however activate without any errors if I remove the lines and activate the plugin. The plugin would also run if the lines are added after the activation, either by FTP or using the code editor.

[garrett-eclipse]

Hello @superpoincare with your function are you wrapping it in a function_exists? When overriding pluggable functions it's recommended to do so to avoid the fatal you're running into.

For safety, it is best to always wrap your functions with if ( !function_exists() ), otherwise you will produce fatal errors on plugin activation.

Reference: ​https://codex.wordpress.org/Pluggable_Functions

I hope that helps overcome the issue, marking as close as this is expected behaviour but leaving open for now incase I misunderstood.

[superpoincare]

Yes, it works that way, I forgot to mention.

Didn't know it was the expected behaviour.

Closing myself.

[garrett-eclipse]

Awesome, thanks for following up @superpoincare