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I am using hook_form_alter() with custom submit handler (). At submit I want to check if there is any change in the content except node->expire then my custom code will run.

but at $form_state['value'] I am also getting: nid, vid, uid, created changed etc. and I have field type as taxonomy term reference and media files.

I do not want to hard-code the fields name as admin may add new fields later on.

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Try comparing both $form_state[input] and $form_state['values'] .

After that check both values using the key's in foreach loop and compare both values, if changed then do your things there.

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  • when I print value of taxonomy term reference for $form_state['input'] i get [field_catagories] => ( [und] => Array ( [31] => 31 [34] => 34 [22] => [26] => ) ) and when I print value of form_state['values'] my return value is field_catagories => ( [und] => Array ( [0] => Array ( [tid] => 31 ) [1] => Array ( [tid] => 34 ) ) ) How to compare
    – Anamika
    Commented Nov 15, 2016 at 15:00
  • Compare keys present then you will get 31 and 34 These two values are your inputted values.
    – Ajay Reddy
    Commented Nov 16, 2016 at 6:34

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