在mac打开终端：
1.查询php版本
php -v
查的PHP版本是：
PHP 7.1.13
2.输入命令：
brew search xdebug
3.找到对应php版本的xdebug：
brew install homebrew/php/php71-xdebug
==> Installing php71-xdebug from homebrew/php
==> Downloading https://homebrew.bintray.com/bottles-php/php71-xdebug-2.5.5.el_c
######################################################################## 100.0%
==> Pouring php71-xdebug-2.5.5.el_capitan.bottle.1.tar.gz
==> Caveats
To finish installing xdebug for PHP 7.1:
* /usr/local/etc/php/7.1/conf.d/ext-xdebug.ini was created,
do not forget to remove it upon extension removal.
* Validate installation via one of the following methods:
*
* Using PHP from a webserver:
* - Restart your webserver.
* - Write a PHP page that calls "phpinfo();"
* - Load it in a browser and look for the info on the xdebug module.
* - If you see it, you have been successful!
*
* Using PHP from the command line:
* - Run `php -i "(command-line ‘phpinfo()‘)"`
* - Look for the info on the xdebug module.
* - If you see it, you have been successful!
==> Summary
?? /usr/local/Cellar/php71-xdebug/2.5.5: 4 files, 209.8KB
4.配置xdebug
在ext-xdebug.ini配置，
vi /usr/local/etc/php/7.1/conf.d/ext-xdebug.ini
如下配置：
[xdebug] zend_extension="/usr/local/opt/php71-xdebug/xdebug.so" xdebug.remote_enable=1 xdebug.remote_host="localhost" xdebug.remote_port=9001 xdebug.profiler_enable=1 xdebug.profiler_output_dir="/Users/lst/develop/debug/" xdebug.idekey="PHPSTORM"
5.配置完成，需重启
重启php-fpm，或是Apache
6.在phpstorm中配置xdebug
1）打开Preferences，在Languages&Frameworks找到php，
2）在php executable里找到bin下的php，选择brew安装的PHP版本，这里使用的是php7.1的bin下的php路径
/usr/local/Cellar/php71/7.1.13_24/bin/php
3）端口号要对应
要与ext-xdebug.ini配置中xdebug.remote_port的端口号一致
4）配置Debug下的DBGp proxy
5)配置servers
6）点击phpstorm右上角的三角形，选择Edit Configurations，配置服务器信息，添加项目调试开发地址，保存完后phpstorm配置完成。
7)重启服务器 nginx或Apache
8)点击小虫子，即刻开启debug
9) chrome安装xdebug
在安装完xdebug后，打开xdebug选项，把IDE key配置得跟之前设置的一样PHPSTORM
