Bludit should check for (critical) disabled functions

[joho1968]

Describe your problem

I typically use PHP-FPM, and for each instance, I have something like this:

php_admin_value[disable_functions] = pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,exec,passthru,shell_exec,system,proc_open,popen,parse_ini_file,show_source,symlink,define_syslog_variables,posix_getpwuid,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,posix_setuid,posix_uname,proc_close,pclose,proc_nice,proc_terminate,show_source,socket_create,socket_listen,socket_write,socket_close,ftp_connect,ftp_ssl_connect,ftp_login,fam_open,fam_close,ldap_connect,ldap_close,fsockopen,dns_get_mx,dns_get_record,getservbyname,pfsockopen,ssh2_connect,ssh2_disconnect,ssh2_exec,ssh2_sftp,ssh2_shell,msg_send,imap_open,imap_close"

So I really think the installer, or some "pre-check script" should be able to detect if function_exists(), at least for things some people may want to disable for security reasons. My two cents.

Steps to reproduce the problem

In this particular case, I was editing content, with no content being saved. So checking php.log, I see this:

PHP Fatal error: Uncaught Error: Call to undefined function symlink() in /home/html/mydomain.com/public_html/bl-kernel/pages.class.php:161

Bludit version

3.14.1

Hosting or Webserver name

Apache/2.4.41 (Ubuntu)

PHP version

8.1.18 (fpm)

PHP logs

See above

[dignajar]

Related issue with symlink, #1467