Last updated Feb 17, 2022


Used to modify the $field settings array before being saved into the database.

This filter should not be confused with acf/update_value which is used similarly to modify field values.


  • Added in version 5.0.0


apply_filters( 'acf/update_field', $field );
  • $field (array) The field array containing all settings.


This filter provides modifiers to target specific fields. The following filter names are available:

  • acf/update_field Applies to all fields.
  • acf/update_field/type={$type} Applies to all fields of a specific type.
  • acf/update_field/name={$name} Applies to all fields of a specific name.
  • acf/update_field/key={$key} Applies to all fields of a specific key.


This example demonstrates how to modify a field’s settings.


function my_acf_update_field( $field ) {

    // Ensure all "company" fields are required.
    if( strpos($field['name'], 'company') !== false ) {
        $field['required'] = true;
    return $field;

// Apply to all fields.
add_filter('acf/update_field', 'my_acf_update_field', 10, 1);

// Apply to textarea fields.
// add_filter('acf/update_field/type=textarea', 'my_acf_update_field', 10, 1);

// Apply to fields named "hero_text".
// add_filter('acf/update_field/name=hero_text', 'my_acf_update_field', 10, 1);

// Apply to field with key "field_123abcf".
// add_filter('acf/update_field/key=field_123abcf', 'my_acf_update_field', 10, 1);