bad-plugin.php

<?php
/*
Plugin Name: Bad Plugin
Description: Bad Plugin for testing PHP errors in QM
Version:     0.1.0
Author:      Darshan Sawardekar
License:     GPL v2 or later
*/

function bad_plugin_main() {
	add_filter( 'qm/collect/silent_php_errors', function( $table ) {
		$table['bad-plugin'] = E_ALL & ~E_NOTICE & ~E_WARNING;
		return $table;
	} );

	add_filter( 'qm/collect/hide_silent_php_errors', function( $hide ) {
		return false; // true will hide these errors
	} );

	bp_unknown_variable();
	bp_warning();
}

function bp_unknown_variable() {
	$a = $unknown * $unknown;
}

function bp_warning() {
	preg_match( 'foo', array() );
}

bad_plugin_main();