php 7.1+ supports utf-8 paths and I/O streams on Windows. file system functions now return utf-8 results, you don't need to convert file paths between character sets.
This new minor version brings with it a number of new features and a few incompatibilities that should be tested for before switching PHP versions in production environments.
See also the migration guides for PHP versions 5.0.x, 5.1.x, 5.2.x, 5.3.x, 5.4.x, 5.5.x, 5.6.x and 7.0.x.
php 7.1+ supports utf-8 paths and I/O streams on Windows. file system functions now return utf-8 results, you don't need to convert file paths between character sets.
For fresh installation on Ubuntu 16.04
If we want to install new version && Remove all php dependencies
sudo apt-get remove php*
sudo apt-get install php7.1 php7.1-cli php7.1-common libapache2-mod-php7.1 php7.1-mysql php7.1-fpm php7.1-curl php7.1-gd php7.1-bz2 php7.1-mcrypt php7.1-json php7.1-tidy php7.1-mbstring php-redis php-memcached