Installing Xdebug for XAMPP with PHP 7.x

Requirements

XAMPP for Windows: https://www.apachefriends.org/download.html
The VC14 build requires the Microsoft Visual C++ Redistributable for Visual Studio 2014
The VC15 build requires the Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019

Setup

Download Xdebug for the specific PHP version:
- PHP 7.0: https://xdebug.org/files/php_xdebug-2.6.1-7.0-vc14.dll
- PHP 7.1: https://xdebug.org/files/php_xdebug-2.7.2-7.1-vc14.dll
- PHP 7.2: https://xdebug.org/files/php_xdebug-2.7.2-7.2-vc15.dll
- PHP 7.3: http://xdebug.org/files/php_xdebug-2.7.2-7.3-vc15-x86_64.dll

Notice: You can also use the built-in Xdebug by using zend_extension = "C:\xampp\php\ext\php_xdebug.dll".

Move the downloaded dll file to: C:\xampp\php\ext
Open the file C:\xampp\php\php.ini with Notepad++
Disable output buffering: output_buffering = Off
Scroll down to the [XDebug] section (or create it) and copy/paste these lines:

[XDebug]
;zend_extension = "c:\xampp\php\ext\php_xdebug.dll"
zend_extension = "c:\xampp\php\ext\php_xdebug-2.7.2-7.3-vc15-x86_64.dll"
xdebug.remote_autostart = 1
xdebug.profiler_append = 0
xdebug.profiler_enable = 0
xdebug.profiler_enable_trigger = 0
xdebug.profiler_output_dir = "c:\xampp\tmp"
;xdebug.profiler_output_name = "cachegrind.out.%t-%s"
xdebug.remote_enable = 1
xdebug.remote_handler = "dbgp"
xdebug.remote_host = "127.0.0.1"
xdebug.remote_log = "c:\xampp\tmp\xdebug.txt"
xdebug.remote_port = 9000
xdebug.trace_output_dir = "c:\xampp\tmp"
;36000 = 10h
xdebug.remote_cookie_expire_time = 36000