PHP Command line hacking

Came across this link:

Had to verify my suspections:

dx@wdp76:~$ sudo apt-get install php7.2-cli
[sudo] password for dx: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  csound csound-data csound-utils libcsound64-6.0 libegl-mesa0:i386 libegl1:i386 libfltk1.1 libgbm1:i386 liblua5.1-0
  libnvidia-common-415 librtaudio6 librtmidi4 libstk-4.5.0 libwayland-egl1-mesa:i386 libwayland-server0:i386
  linux-headers-4.15.0-46 linux-headers-4.15.0-46-lowlatency linux-image-4.15.0-46-lowlatency linux-modules-4.15.0-46-lowlatency
  linux-tools-4.15.0-46 linux-tools-4.15.0-46-lowlatency stk
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  php-common php7.2-common php7.2-json php7.2-opcache php7.2-readline
Suggested packages:
The following NEW packages will be installed:
  php-common php7.2-cli php7.2-common php7.2-json php7.2-opcache php7.2-readline
0 upgraded, 6 newly installed, 0 to remove and 26 not upgraded.
Need to get 2,500 kB of archives.
After this operation, 12.3 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 bionic/main amd64 php-common all 1:60ubuntu1 [12.1 kB]
Get:2 bionic-updates/main amd64 php7.2-common amd64 7.2.15-0ubuntu0.18.04.2 [883 kB]
Creating config file /etc/php/7.2/cli/php.ini with new version
dx@wdp76:~$ php -qa
Interactive mode enabled

php > $x="465554555245";
php > while ( strlen($x) ) {
php { $o=substr($x,0,2); $x=substr($x,2);
php { $i=hexdec($o); print chr($i); }