Pear error "XML Extension not found" on Ubuntu 14.04 after installing php-xml & php-xml7.0

I wanna use the pecl command to install redis to my php on Ubuntu 14.04. But my Pear is giving me a list of warnings:

Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: honorsbaseinstall in Role.php on line 173Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: installable in Role.php on line 139Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: phpfile in Role.php on line 204Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Notice: Undefined index: config_vars in Role.php on line 46Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in PEAR/Command.php on line 249Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/Command.php on line 249XML Extension not found

Last line gives me this message

XML Extension not found

, although I installed #sudo apt-get install php-xml php7.0-xml. But the same problem still occurs.

What could be the problem?