Prevent hook_form_alter to works only on frontend not in admin?

Question

I have used a hook_form_alter to alter a form fields value randomly and its working fine, but the problem is that when i open this webform in admin panel its just change the value which i dont. Its should keep the same value which is submitted by frontend user. i want this hook to work in case of frontend only not for admin.

Answer 1

If you have multiple admins, then check with user role, lets have admin_role as a Admin role

function MODULE_form_alter(&$form, &$form_state, $form_id) {
  global $user;

  if(in_array('admin_role', $user->roles)) {
    return;
  }
 else {
    //alter fields logic goes here
  }
}

Answer 2

you could use the global variable $user to achieve it.

<?php

function MODULE_form_alter(&$form, &$form_state, $form_id) {
  global $user;

  if($user->uid == 1) {
    return;
  }
  else {
    //alter fields logic goes here
  }
}

Answer 3

you should implement some check for the user roles of admin like this.

function modulename_form_alter(&$form, &$form_state, $form_id) {
  global $user;

  $adminroleid = 1 ; // It should be id for admin role, you should change this according to your's admin role id.

  if(array_key_exists($adminroleid, $user->roles)) {
    return;
  }
 else {
    // write your's form alter fields logic here .
  }
}