php - PEAR Dont see XML_Parser -

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i install xml/rss package prar. , see 

ls -la /usr/share/php/xml/ итого 84 drwxr-xr-x  4 root root  4096 авг  8 14:19 . drwxr-xr-x 19 root root  4096 авг  8 14:10 .. drwxr-xr-x  2 root root  4096 авг  5 11:49 parser -rw-rw-r--  1 root root 20928 авг  8 14:19 parser.php drwxr-xr-x  5 root root  4096 авг  8 13:32 rpc2 -rw-rw-r--  1 root root 10457 авг  8 14:04 rss.php -rw-r--r--  1 root root 30531 авг  8 14:08 util.php

but when try use rss parser have error: 

php message: php fatal error:  call undefined method pear::xml_parser() in /usr/share/php/pear.php on line 218" while reading response header upstream, client: 192.168.1.1, server: www.example.org, request: "get /team/cron http/1.1", upstream: "fastcgi://unix:/var/run/php/php7.1-fpm.sock:", host: "example.org"


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