<?php
$output = shell_exec("sudo -u dummy passwd testUser testUserPassword");
$output2 = shell_exec("dummyPassword");
echo $output;
echo $output2;
echo "done";
?>

#!/usr/bin/expect -f
set username [lindex $argv 0]
set password [lindex $argv 1]

spawn passwd $username
expect "(current) UNIX password: "
send "$passwordr"
expect "Enter new UNIX password: "
send "$passwordr"
expect "Retype new UNIX password: "
send "$passwordr"
expect eof

<?php
shell_exec("sudo -u root /path/to/passwd_change.sh testUser testUserPass");
?>

<?php
$pipe = popen("sudo -u dummy passwd testUser testUserPassword", 'r');
fwrite($pipe, "dummyPasswdrn");
pclose($pipe);
echo "done";
?>

$tmpfname = tempnam('/tmp/', 'chpasswd');
$handle = fopen($tmpfname, "w");
fwrite($handle, "$username:".crypt($password)."n");
fclose($handle);
shell_exec("sudo sh -c "chpasswd -e < $tmpfname"");

#!/bin/bash

USER="root"
NEWPASS="bullsheit123"

echo $USER:$NEWPASS | chpasswd
echo $?

file_put_contents("passd", "$passn$passn");
    echo "$uname: $passn";
    `passwd $uname --stdin < passd`;
    `rm -rf passd`;