一、安裝composer、php-cgi(注意，必須是cgi，不能用cli或fpm)、php-xdebug
sudo apt-get install php-cgi php-xdebug
sudo curl -s https://getcomposer.org/installer | php
sudo mv composer.phar /usr/local/bin/composer
sudo chown root.root /usr/local/bin/composer
sudo chmod 755 /usr/local/bin/composer
二、修改xdebug設定
sudo vi /etc/php/7.2/cgi/conf.d/20-xdebug.ini
加上
xdebug.remote_enable=1
php-cgi --version //須出現xdebug字眼
with Xdebug v2.6.0, Copyright (c) 2002-2018, by Derick Rethans
三、chrome或firefox安裝xdebug plugin
https://www.jetbrains.com/help/idea/2020.3/browser-debugging-extensions.html
擴充功能選項的IDE Key選擇PHPSTORM
四、修改IntelliJ的language & frameworks / PHP 設定
新增 /usr/bin/php-cgi
五、執行選單 Run / Web Server Debug Validation，看是否能正常debug
若使用intellij內建的web server + php-cgi，可能會沒有$_SERVER['SERVER_NAME'] 造成無法正常透過瀏覽器debug，下面的ref有解法但不一定有用，似乎是intellij的bug，似乎還是得換成nginx或apache才能解決，若用外部server，須到 language & frameworks / PHP / Servers及build,excution,deployment->Deployment去新增對應的server
ref:
https://www.jetbrains.com/help/idea/2020.3/configuring-xdebug.html
https://www.jetbrains.com/help/idea/2020.3/zero-configuration-debugging.html
https://youtrack.jetbrains.com/issue/WI-54542
https://stackoverflow.com/questions/23344106/php-storm-debugging-creates-empty-server-definitions
https://www.cnblogs.com/Renyi-Fan/p/9117895.html
