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

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

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