Small class helper for get ACF fields for a specific post type

bea-acf-helpers.php

<?php
class BEA_ACF_Helpers {
	// Fields to not add to the available fields of acf
	private static $unauth_fields = array(
		'repeater',
		'relationship',
		'flexible_content'
	);

	/**
	 * Get the ACF fields for current post type
	 */
	public static function get_fields( $post_type = 'post', $field_name = null ) {
		global $acf_register_field_group;
		
		$fields = array();

		// Parse the acf fields
		foreach( $acf_register_field_group as $field_group ) {
			if( empty( $field_group ) || ( !empty( $post_type ) && !self::is_post_type_in_group( $field_group['location'], $post_type ) ) ) {
				continue;
			}
			
			foreach ( $field_group['fields'] as $field ) {
				// Skip the not really usable fields
				if( in_array( $field['type'], self::$unauth_fields ) ) {
					continue;
				}

				if ( $field_name == null ) {
					$fields[$field['key']] = $field;
				} else {
					$fields[$field['key']] = $field[$field_name];
				}
			}
		}
		
		return $fields;
	}

	public static function is_post_type_in_group( $location_array, $post_type ) {
		foreach( $location_array[0] as $location ) {
			// Skip the not post_type array
			if( $location['param'] != 'post_type' || $location['operator'] !== '==' ) {
				continue;
			}
			
			// If we have the post_type, then set it as true
			if( $location['value'] == $post_type ) {
				return true;
			}
		}
		
		return false;
	}
}

Voilà la class qui fonctionne correctement et avec les champs enregistrés en base :

<?php
class BEA_ACF_Helpers {
    // Fields to not add to the available fields of acf
    private static $unauth_fields = array(
        'repeater',
        'relationship',
        'flexible_content'
    );

    /**
     * Get the ACF fields for current post type
     */
    public static function get_fields( $filters = array( 'post_type' => 'post' ), $field_name = null ) {
        global $acf_register_field_group;

        // Get tehe fields matching the post_type
        $matching_group_fields = apply_filters( 'acf/location/match_field_groups', false, $filters );

        // Return empty data if nothing found for this location
        if( empty( $matching_group_fields ) ) {
            return array();
        }

        // Make array basesc fields
        $final_fields = array();

        // Get the ACF fields
        $acfs = apply_filters( 'acf/get_field_groups', array() );

        // Get all the group and fields data
        foreach( $acfs as $index => $acf ) {

            if( !in_array( $acf['id'], $matching_group_fields ) ) {
                continue;
            }

            $acf['fields'] = apply_filters( 'acf/field_group/get_fields', array(), $acf['id'] );
            $acf['options'] = apply_filters( 'acf/field_group/get_options', array(), $acf['id'] );
            $acf['location'] = apply_filters( 'acf/field_group/get_location', array(), $acf['id'] );
            $final_fields[] = $acf;
        }


        // Merge the two arrays
        $final_fields = $acf_register_field_group+$final_fields;

        // Init returned array
        $fields = array();

        // Parse the acf fields
        foreach( $final_fields as $field_group ) {

            if( empty( $field_group ) ) {
                continue;
            }

            foreach ( $field_group['fields'] as $field ) {
                // Skip the not really usable fields
                if( in_array( $field['type'], self::$unauth_fields ) ) {
                    continue;
                }

                if ( $field_name == null ) {
                    $fields[$field['key']] = $field;
                } else {
                    $fields[$field['key']] = $field[$field_name];
                }
            }
        }

        return $fields;
    }
}