acf/schema/format_value/pre/type={field_type}

Documentation Filters acf/schema/format_value/pre/type={field_type}

Last updated Mar 31, 2026

Overview

Pre-filter values for a specific field type before default formatting.

Description

This filter is a field type specific version of acf/schema/format_value/pre. It allows you to pre-process values before ACF’s default formatting, but only for a specific field type.

The dynamic portion of the hook name, {field_type}, refers to the ACF field type.

Changelog

• Added in version 6.8.0

Parameters

apply_filters( 'acf/schema/format_value/pre/type={field_type}', $pre_value, $value, $field_object );

• $pre_value (mixed) Pre-formatted value from previous filters, or null
• $value (mixed) The raw field value
• $field_object (array) The field object with settings

Return

(mixed|null) The pre-formatted value, or null to use default formatting.

Example

This example provides custom user formatting.

/**
 * Custom user field formatting for Person schema.
 *
 * @param mixed $pre_value    Pre-formatted value or null.
 * @param mixed $value        The raw value (user ID or array).
 * @param array $field_object The field object.
 * @return mixed Pre-formatted value or null.
 */
function my_acf_schema_format_user( $pre_value, $value, $field_object ) {
    if ( ! $value ) {
        return $pre_value;
    }

    $user_id = is_array( $value ) ? $value['ID'] : $value;
    $user    = get_userdata( $user_id );

    if ( ! $user ) {
        return $pre_value;
    }

    return array(
        '@type'  => 'Person',
        'name'   => $user->display_name,
        'url'    => get_author_posts_url( $user_id ),
        'email'  => $user->user_email,
        'sameAs' => array(
            get_user_meta( $user_id, 'twitter', true ),
            get_user_meta( $user_id, 'linkedin', true ),
        ),
    );
}
add_filter( 'acf/schema/format_value/pre/type=user', 'my_acf_schema_format_user', 10, 3 );

Related

• Filters: acf/schema/format_value/pre/name={field_name}
• Filters: acf/schema/format_value/type={field_type}
• Filters: acf/schema/format_value/name={field_name}
• Filters: acf/schema/format_value/pre
• Filters: acf/schema/format_value