I have restarted nginx and php7.4-fpm.
xdebug 3 looks like is installed based on this:
root@darius-Vostro-5481:/home/darius/Private/Projects/vop7# apt search xdebug
Sorting... Done
Full Text Search... Done
php-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed]
Xdebug Module for PHP
php5.6-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
php7.0-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
php7.1-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed]
Xdebug Module for PHP
php7.2-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
php7.3-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
php7.4-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
php8.0-xdebug/bionic,now 3.0.1+2.9.8+2.8.1+2.5.5-1+ubuntu18.04.1+deb.sury.org+1 amd64 [installed,automatic]
Xdebug Module for PHP
Ini directories from phpinfo():
Loaded Configuration File /etc/php/7.4/fpm/php.ini Scan this dir for additional .ini files /etc/php/7.4/fpm/conf.d Additional .ini files parsed /etc/php/7.4/fpm/conf.d/10-opcache.ini, /etc/php/7.4/fpm/conf.d/10-pdo.ini, /etc/php/7.4/fpm/conf.d/15-xml.ini, /etc/php/7.4/fpm/conf.d/20-bcmath.ini, /etc/php/7.4/fpm/conf.d/20-calendar.ini, /etc/php/7.4/fpm/conf.d/20-ctype.ini, /etc/php/7.4/fpm/conf.d/20-dom.ini, /etc/php/7.4/fpm/conf.d/20-exif.ini, /etc/php/7.4/fpm/conf.d/20-ffi.ini, /etc/php/7.4/fpm/conf.d/20-fileinfo.ini, /etc/php/7.4/fpm/conf.d/20-ftp.ini, /etc/php/7.4/fpm/conf.d/20-gettext.ini, /etc/php/7.4/fpm/conf.d/20-iconv.ini, /etc/php/7.4/fpm/conf.d/20-igbinary.ini, /etc/php/7.4/fpm/conf.d/20-imagick.ini, /etc/php/7.4/fpm/conf.d/20-json.ini, /etc/php/7.4/fpm/conf.d/20-phar.ini, /etc/php/7.4/fpm/conf.d/20-posix.ini, /etc/php/7.4/fpm/conf.d/20-readline.ini, /etc/php/7.4/fpm/conf.d/20-redis.ini, /etc/php/7.4/fpm/conf.d/20-shmop.ini, /etc/php/7.4/fpm/conf.d/20-simplexml.ini, /etc/php/7.4/fpm/conf.d/20-sockets.ini, /etc/php/7.4/fpm/conf.d/20-sysvmsg.ini, /etc/php/7.4/fpm/conf.d/20-sysvsem.ini, /etc/php/7.4/fpm/conf.d/20-sysvshm.ini, /etc/php/7.4/fpm/conf.d/20-tokenizer.ini, /etc/php/7.4/fpm/conf.d/20-xdebug.ini, /etc/php/7.4/fpm/conf.d/20-xmlreader.ini, /etc/php/7.4/fpm/conf.d/20-xmlwriter.ini, /etc/php/7.4/fpm/conf.d/20-xsl.ini, /etc/php/7.4/fpm/conf.d/20-zip.ini
/etc/php/7.4/fpm/conf.d/20-xdebug.ini content:
# xdebug 3 -
zend_extension=/usr/lib/php/20200930/xdebug.so
I do not know how to check if this is the right file. They write in the docs:
Add the following line to php.ini:
zend_extension=/wherever/you/put/it/xdebug
How can I know where I put? :) It was installed by install command, it put where it put :) In that directory there is no file without .so . I just used similar directory and file name to what was xdebug 2.
phpinfo() does not show xdebug loaded.
Adding xdebug_info(); to file crashes the page - probably this function is not defined.
As @LazyOne said
for PHP 7.4 the folder should be 20190902
So setting in ini file
zend_extension=/usr/lib/php/20190902/xdebug.so
loads xdebug 3 for Php 7.4 . Thanks