How to send SMS using PHP in Raspbian?

Question

PHP

I can't figure out how to send SMS using PHP.
Device: Raspberry Pi,
Axis: Raspbian,
Software: Gammu.
Sending from the command line:

gammu sendsms TEXT [phone] -textutf8 "Proverka"

Help with PHP code.
It doesn't work like this:

$command = 'gammu sendsms TEXT [phone] -textutf8 "Proverka"';
$output = shell_exec($command);
echo "<pre>$output</pre>";
echo $output;
/* СМС не отправляет. Выводит на экран
Warning: No configuration file found!
Warning: No configuration read, using builtin defaults!
Error opening device, it doesn't exist.
Warning: No configuration file found! Warning: No configuration read, using builtin defaults! Error opening device, it doesn't exist.
*/
----------------------------------------------------------------------------------
$command = 'sudo gammu sendsms TEXT [phone] -textutf8 "Proverka"';
$output = shell_exec($command);
echo "<pre>$output</pre>";
echo $output;
/* СМС не отправляет. Ничего не выводит */
----------------------------------------------------------------------------------
$command = 'sudo /usr/bin/gammu sendsms TEXT [phone] -textutf8 "Proverka"';
$output = shell_exec($command);
echo "<pre>$output</pre>";
echo $output;
/* СМС не отправляет. Ничего не выводит */

The gammu-config file is located in the folder with this script.

Answer 1

Perhaps the permissions on the configuration file are set incorrectly and when running from php it is impossible to read it

Answer 2

You have clearly been told what the error is:
And it works from the command line, because the environment variables (including HOME, in which the configs are located) are from your user, and not www-data.

Answer 3

Either specify for gammu even before the configuration file (if it understands this), or specify everything that it needs (port device name, port parameters, etc.) when calling gammu.

Answer 4

On Linux, MacOS X, BSD and other Unix-like systems, the config file is searched in following order:
$XDG_CONFIG_HOME/gammu/config
~/.config/gammu/config
~/.gammurc
/etc/gammurc
drop the config at /etc/gammurc