How to run bash in php?

Question

linux

wrote a script for sending messages
<?php
$tel = $_REQUEST['rec'];
$text = $_REQUEST['text'];
$text2 = str_replace('"', ' ', $text);
$text3 = str_replace('\r\n', '###', $text2);
exec("/home/admin/yowsup/yowsup- cli demos --yowsup --config config " .$tel.' "' .$text3. '"');
?>
but for some reason the script doesn't work.

Answer 1

Probably forgot to check the rights? php has permission to execute this command?
The answer should be given by the console in any case
Redirect the console response with an error tostdout a stderrfile, add it after your line in the parameters to the end of the
current
redirecting-stderr-to-stdout

Answer 2

А почему строку для запуска сразу не собрать в переменную и не отдать её в качестве параметра exec()
$str = "/home/admin/yowsup/yowsup-cli demos --yowsup --config config " .$tel.' "' .$text3
exec($str)

Answer 3

Atyowsup-cli есть права на выполнение?