Catch the moment when theme is deleted

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WordPress 5.8.1

functions.php

add_action( 'deleted_theme', 'nonverbis_delete_extra_table', 10, 2 );
function nonverbis_delete_extra_table( $stylesheet, $deleted ){
    error_log("delete_extra_table", 0);
}

What I do:

The log is empty. I mean that everything that this function does is writing "delete_extra_table" to the log. I don't have a debugger, so, I use writing to log for the debug purpose.

But the log is empty. This means that either a hook is wrong. Or some params (10, 2). Or I confused something else (like log or something).

To the best of my understanding, this line should have appeared in the log after I had pressed "Delete".

Could you help me understand why nothing has been written to the log?

And of course, the table has not been dropped.

WordPress 5.8.1

functions.php

add_action( 'deleted_theme', 'nonverbis_delete_extra_table', 10, 2 );
function nonverbis_delete_extra_table( $stylesheet, $deleted ){
    error_log("delete_extra_table", 0);
}

What I do:

The log is empty. I mean that everything that this function does is writing "delete_extra_table" to the log. I don't have a debugger, so, I use writing to log for the debug purpose.

But the log is empty. This means that either a hook is wrong. Or some params (10, 2). Or I confused something else (like log or something).

To the best of my understanding, this line should have appeared in the log after I had pressed "Delete".

Could you help me understand why nothing has been written to the log?

And of course, the table has not been dropped.

• theme-development

Share Improve this question edited Nov 2, 2021 at 19:16 Kifsif asked Nov 2, 2021 at 19:03 KifsifKifsif 10122 bronze badges 3

• 1 If that code is in the theme then it's not going to run because the code was deleted when the theme was deleted. – Jacob Peattie Commented Nov 3, 2021 at 0:41
• You are right. But what hook should I use? I want to drop the database table I created for this theme. – Kifsif Commented Nov 3, 2021 at 7:06
• 1 You could only do it when switching theme with switch_theme. Themes don’t normally create database tables. That sort of thing usually belongs in plugins, which have the appropriate capabilities for cleaning up when deleted. – Jacob Peattie Commented Nov 3, 2021 at 7:32

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1 Answer 1

Sorted by: Reset to default 0

There are two direct actions that you can hook into while deleting a theme

do_action( 'delete_theme', $stylesheet );

And

do_action( 'deleted_theme', $stylesheet, $deleted );

Now about the error_log() function, you seem to be missing a argument, the destination.
One of my debugging tool is a custom error_log function, this is its code.

error_log(print_r($some_value, true), 3, __DIR__ . '/log.txt');
error_log("\r\n\r\n", 3,  __DIR__ . '/log.txt');

This will create a log.txt file in the same folder where you called this functions. If you use this in functions.php the log.txt will be in the root of your theme.

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