striplangs.php: 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 CentOS possible default full paths are:

/usr/share/dokuwiki/bin/striplangs.php - from package: dokuwiki

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/share/dokuwiki/bin/striplangs.php - from package: dokuwiki

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

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