Fail to install xdebug in Ubuntu with php7.2

Question

I'm trying to install xdebug in my recently upgraded Ubuntu 20.04.1

When I place the output of phpinfo() in https://xdebug.org/wizard I get:

Installation Wizard
Summary
Xdebug installed: no
Server API: Apache 2.0 Handler
Windows: no
Zend Server: no
PHP Version: 7.2.34
Zend API nr: 320170718
PHP API nr: 20170718
Debug Build: no
Thread Safe Build: no
OPcache Loaded: no
Configuration File Path: /opt/lampp/etc
Configuration File: /opt/lampp/etc/php.ini
Extensions directory: /opt/lampp/lib/php/extensions/no-debug-non-zts-20170718

The installation recommends me to install the version: xdebug-3.0.1 But when I follow the instructions I get this error from the terminal:

The following packages have unmet dependencies:
 php-dev : Depends: php7.4-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

How can I solve this problem? Should I install an older package of xdebug to be compatible with my php7.2 version?

Thanks in advance.

Answer 1

I solved the problem by installing php7.2-dev in my Ubuntu 20.04.1

sudo add-apt-repository ppa:ondrej/php -y
sudo apt-get update
sudo apt-get install php7.2-dev

After that I could run phpize and still use XDebug 3.

Answer 2

set php v7.2(optional)

update-alternatives --set php /usr/bin/php7.2

then set and update all needed for php7.2:

sudo add-apt-repository ppa:ondrej/php -y
sudo apt-get update
sudo apt-get install -y php7.2 php7.2-xdebug