qm/dispatch/... and qm/process hooks

[rask]

As qm/process is seemingly deprecated (contains a backcompat notice above the hook), I though some more documentation was needed on the qm/dispatch/<type> hooks. One use of the qm/process hook was to disable output on some pages (e.g. if the admin bar was not available). How do I use the qm/dispatch/... hooks to disable query monitor output?

I'll dig through the code but a short documentation on the hooks would be nice. :)

[johnbillion]

Yeah documentation for the hooks in QM is on my todo list. You can use the qm/dispatch/html filter to disable all HTML output on a given page:

add_filter( 'qm/dispatch/html', function( $dispatch ) {
    if ( $condition ) {
        return false;
    } else {
        return $dispatch;
    }
} );

Similarly, there are qm/dispatch/ajax, qm/dispatch/redirect, and qm/dispatch/rest filters to disable the header output in AJAX requests, redirects, and REST API requests respectively, if necessary.

[rask]

qm/dispatch/html did the trick for me, I'll need to checkout how the AJAX etc. dispatcher are wired to find possible use cases.