Je potřeba doinstalovat balík php-mbstring. Je potřeba doinstalovat balík php7.0-mbstring, právě že nové php je v /etc/php.
$ apt-cache search mbstring
php-mbstring - MBSTRING module for PHP [default]
php-patchwork-utf8 - UTF-8 strings handling for PHP
php7.0-mbstring - MBSTRING module for PHP
$ apt-cache show php7.0-mbstring
Package: php7.0-mbstring
Priority: optional
Section: universe/php
Installed-Size: 1462
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Debian PHP Maintainers <pkg-php-maint@lists.alioth.debian.org>
Architecture: amd64
Source: php7.0
Version: 7.0.4-7ubuntu2.1
Provides: php-mbstring
Depends: php-common (>= 1:33), ucf, php7.0-common (= 7.0.4-7ubuntu2.1), libc6 (>= 2.14)
Filename: pool/universe/p/php7.0/php7.0-mbstring_7.0.4-7ubuntu2.1_amd64.deb
Size: 464048
MD5sum: e77e5cc1e1787d13c90a6094debb294b
SHA1: a7b03eb44c8e9fcdcec6eece130af61ba6dda0fb
SHA256: 01f5aeee6be404ab6d4551da901c4b5182d4bac9b3aae81ff3ac19117b703e92
Description-en: MBSTRING module for PHP
This package provides the MBSTRING module(s) for PHP.
.
PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used
open source general-purpose scripting language that is especially suited
for web development and can be embedded into HTML.
Description-md5: 741a0b4b31628c18e80bdef4f0ec8141
Homepage: http://www.php.net/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Package: php7.0-mbstring
Priority: optional
Section: universe/php
Installed-Size: 1462
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Debian PHP Maintainers <pkg-php-maint@lists.alioth.debian.org>
Architecture: amd64
Source: php7.0
Version: 7.0.4-7ubuntu2
Provides: php-mbstring
Depends: php-common (>= 1:33), ucf, php7.0-common (= 7.0.4-7ubuntu2), libc6 (>= 2.14)
Filename: pool/universe/p/php7.0/php7.0-mbstring_7.0.4-7ubuntu2_amd64.deb
Size: 463714
MD5sum: dcea7b732d37e24e3bcef143209f0b72
SHA1: 47069d8a597bb45d208ca910c0b297bd3a0106ce
SHA256: b1722cb59ab4a518462e9b8e963c5bafa5e3804d72659ac8ce51ff993079b98f
Description-en: MBSTRING module for PHP
This package provides the MBSTRING module(s) for PHP.
.
PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used
open source general-purpose scripting language that is especially suited
for web development and can be embedded into HTML.
Description-md5: 741a0b4b31628c18e80bdef4f0ec8141
Homepage: http://www.php.net/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu