Achte mal auf meine Schritte

[KevinB]

phpize -v
Configuring for:
PHP Api Version:         20230831
Zend Module Api No:      20230831
Zend Extension Api No:   420230831

which phpize
/usr/bin/phpize

ls -l /usr/bin/phpize
lrwxrwxrwx 1 root root 24 Dec 29 08:56 /usr/bin/phpize -> /etc/alternatives/phpize

ls -l /etc/alternatives/phpize
lrwxrwxrwx 1 root root 18 Dec 29 08:56 /etc/alternatives/phpize -> /usr/bin/phpize8.3

ls -l /usr/lib/php
drwxr-xr-x 2 root root 4096 Jan  2 06:53 20160303
drwxr-xr-x 2 root root 4096 Jan  2 06:53 20220829
drwxr-xr-x 3 root root 4096 Jan  3 13:10 20230831
drwxr-xr-x 2 root root 4096 Jan  2 06:53 7.1
drwxr-xr-x 2 root root 4096 Dec 29 08:56 8.2
drwxr-xr-x 3 root root 4096 Jan  2 16:10 8.3
-rw-r--r-- 1 root root   13 Jul 13  2022 packaging
-rwxr-xr-x 1 root root  514 Jul 13  2022 php-fpm-socket-helper
-rw-r--r-- 1 root root 4845 Jul 13  2022 php-helper
-rw-r--r-- 1 root root 9234 Jul 13  2022 php-maintscript-helper
-rwxr-xr-x 1 root root 2976 Jul 13  2022 sessionclean

cd /usr/bin
for file in $(ls phpize*); do echo $file " : " $($file -v); done

phpize  :  Configuring for: PHP Api Version: 20230831 Zend Module Api No: 20230831 Zend Extension Api No: 420230831
phpize8.3  :  Configuring for: PHP Api Version: 20230831 Zend Module Api No: 20230831 Zend Extension Api No: 420230831

Nach allem, was ich bisher gesehen habe, wird phpize für php8.3 verwendet.