What PHP functions Does WP-DBManager Use?

Under the PHP security tab for my WordPress app on RunCloud the below functions are disabled by default and WP-DBManager gives the error “Invalid Backup File Path”. If I just remove them all, WP-DBManager works fine. Can you identify which php function below might be causing the mysql path and dump not to be found?

getmyuid,leak,listen,diskfreespace,tmpfile,link,shell_exec,dl,highlight_file,source,show_source,fpassthru,virtual,
posix_ctermid,posix_getcwd,posix_getegid,posix_geteuid,posix_getgid,posix_getgrgid,posix_getgrnam,posix_getgroups,
posix_getlogin,posix_getpgid,posix_getpgrp,posix_getpid,posix,_getppid,posix_getpwuid,posix_getrlimit,posix_getsid,
posix_getuid,posix_isatty,posix_kill,posix_mkfifo,posix_setegid,posix_seteuid,posix_setgid,posix_setpgid,posix_setsid,
posix_setuid,posix_times,posix_ttyname,posix_uname,proc_open,proc_close,proc_nice,proc_terminate,escapeshellcmd,
ini_alter,popen,pcntl_exec,socket_accept,socket_bind,socket_clear_error,socket_close,socket_connect,symlink,posix_geteuid,
ini_alter,socket_listen,socket_create_listen,socket_read,socket_create_pair,stream_socket_server