php exec 返回 sh: 1: 'not found'

Question

So I've installed 'translate-toolkit' to use 'po2txt', everything works fine when I run it in terminal. But when I try run it in a php file,

<?php

exec('po2txt --version');

I get sh: 1: po2txt: not found

I'm really unsure about what I've missed, if I run for example

<?php

exec('git --version');

It returns normally. So I guess I'm unsure as to why it works when I use it in terminal but if I try execute it through a php file it isn't found..

Answer 1

Where is the installation path of po2txt ?
You can simply find it by running this command in terminal: which po2txt
check the path of po2txt is exists in your PATH variable?