exec（“ls”）没有返回完整的“ls”

Question

So I have this PHP code which is pretty simple.

$string = exec("ls foo");

In foo I have 4 files

foo
bar
hi
bye

But echo $string returns bye

How can I make it return all of the files? Is it not working because ls separates by tabs?

Answer 1

From the manual: http://php.net/manual/en/function.exec.php

Return Values

The last line from the result of the command. If you need to execute a command and have all the data from the command passed directly back without any interference, use the ˋpassthru()ˋ function.