docker-compose.yml

version: '3.1'
services:
  web:
    build: .docker/php
    volumes:
      - .:/var/www/html/
      - ./.docker/data/xdebug:/tmp/xdebug
    ports:
      - "8100:80"
    environment:
      XDEBUG_CONFIG: remote_host=host.docker.internal remote_port=9000 remote_enable=1 idekey=IDEA_DEBUG profiler_enable=1 profiler_aggregate=1 profiler_output_dir=/tmp/xdebug 
    stdin_open: true
    tty: true
  webgrind:
    image: devgeniem/webgrind
    ports:
        - "8101:80"
    volumes:
       - .:/var/www/html/
       - ./.docker/data/xdebug:/tmp/xdebug
    environment:
        XDEBUG_OUTPUT_DIR: "/tmp/xdebug"

Dockerfile

# original path: .docker/php/Dockerfile

FROM php:7.2.2-apache
# enable mod_rewrite
RUN a2enmod rewrite
# PHP extensions
RUN docker-php-ext-install pdo_mysql exif
# Enable xdebug for debugging & profiling
RUN pecl install xdebug && docker-php-ext-enable xdebug

index.php

<?php
echo "hello";

Log output

web_1       | [Thu Aug 08 12:52:37.136120 2019] [core:notice] [pid 1] AH00052: child pid 32 exit signal Segmentation fault (11)

php.ini

; needed as environment variable is ignored
; see https://bugs.xdebug.org/view.php?id=1693
xdebug.profiler_aggregate=1