phar5: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/phar5 - from package: php5-cli

You may install the required package with command apt-get install {package}

Error in other languages:
phar5: bevel nie gevind nie
phar5: comandă negăsită
phar5: comando não encontrado
phar5: commande introuvable
phar5: command not found
phar5: käsku ei ole
phar5: không tìm thấy lệnh
phar5: komanda nerasta
phar5: Kommando nicht gefunden.
phar5: kommandot finns inte
phar5: komut yok
phar5: nie znaleziono polecenia
phar5: níor aimsíodh an t-ordú
phar5: no se encontró la orden
phar5: no s'ha trobat l'ordre
phar5: opdracht niet gevonden
phar5: parancs nem található
phar5: perintah tidak ditemukan
phar5: príkaz nenájdený
phar5: příkaz nenalezen
phar5: команда не найдена
phar5: командата не е открита
phar5: 命令找不到
phar5: コマンドが見つかりません