zts-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/bin/zts-php - from package: php54w-devel
/usr/bin/zts-php - from package: php55w-devel
/usr/bin/zts-php - from package: php56w-devel
/usr/bin/zts-php - from package: php70w-devel

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

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