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custom fields missing when including via functions.php

When I export the code from advanced custom fields to php and include it via functions.php, the custom fields are missing. What am I doing wrong?.

I tried inculde and require als added template directory.

require get_template_directory() .'/inc/acf.php';


<?php

if(function_exists("register_field_group"))
{
    register_field_group(array (
        'id' => 'acf_downloads',
        'title' => 'Downloads',
        'fields' => array (
            array (
                'key' => 'field_566bf27b4c605',
                'label' => 'File',
                'name' => 'file',
                'type' => 'file',
                'save_format' => 'url',
                'library' => 'all',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'downloads',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_gallery',
        'title' => 'Gallery',
        'fields' => array (
            array (
                'key' => 'field_566ad91dfd890',
                'label' => '',
                'name' => '',
                'type' => 'text',
                'default_value' => '',
                'placeholder' => '',
                'prepend' => '',
                'append' => '',
                'formatting' => 'html',
                'maxlength' => '',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'gallery',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_introheader',
        'title' => 'IntroHeader',
        'fields' => array (
            array (
                'key' => 'field_5669698eb1da6',
                'label' => 'Headline',
                'name' => 'headline',
                'type' => 'text',
                'default_value' => '',
                'placeholder' => '',
                'prepend' => '',
                'append' => '',
                'formatting' => 'html',
                'maxlength' => '',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'introheader',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
                0 => 'permalink',
                1 => 'the_content',
                2 => 'excerpt',
                3 => 'custom_fields',
                4 => 'discussion',
                5 => 'comments',
                6 => 'revisions',
                7 => 'slug',
                8 => 'author',
                9 => 'format',
                10 => 'featured_image',
                11 => 'categories',
                12 => 'tags',
                13 => 'send-trackbacks',
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_skills',
        'title' => 'Skills',
        'fields' => array (
            array (
                'key' => 'field_566ad6a808611',
                'label' => 'font awsome icon',
                'name' => 'font_awsome_icon',
                'type' => 'text',
                'default_value' => '',
                'placeholder' => '',
                'prepend' => '',
                'append' => '',
                'formatting' => 'html',
                'maxlength' => '',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'skills',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_subheading',
        'title' => 'Subheading',
        'fields' => array (
            array (
                'key' => 'field_567971893b6be',
                'label' => 'Subheading',
                'name' => 'subheading',
                'type' => 'text',
                'default_value' => '',
                'placeholder' => '',
                'prepend' => '',
                'append' => '',
                'formatting' => 'html',
                'maxlength' => '',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'page',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'post',
                    'order_no' => 0,
                    'group_no' => 1,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_timeline',
        'title' => 'Timeline',
        'fields' => array (
            array (
                'key' => 'field_56703e70330ec',
                'label' => 'color',
                'name' => 'color',
                'type' => 'color_picker',
                'default_value' => '',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'timeline',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
            ),
        ),
        'menu_order' => 0,
    ));
    register_field_group(array (
        'id' => 'acf_work',
        'title' => 'Work',
        'fields' => array (
            array (
                'key' => 'field_56714f58af64b',
                'label' => 'gallery',
                'name' => 'gallery',
                'type' => 'wysiwyg',
                'default_value' => '',
                'toolbar' => 'full',
                'media_upload' => 'yes',
            ),
        ),
        'location' => array (
            array (
                array (
                    'param' => 'post_type',
                    'operator' => '==',
                    'value' => 'work',
                    'order_no' => 0,
                    'group_no' => 0,
                ),
            ),
        ),
        'options' => array (
            'position' => 'normal',
            'layout' => 'no_box',
            'hide_on_screen' => array (
                0 => 'excerpt',
                1 => 'custom_fields',
                2 => 'discussion',
                3 => 'comments',
                4 => 'revisions',
                5 => 'slug',
                6 => 'author',
                7 => 'format',
                8 => 'send-trackbacks',
            ),
        ),
        'menu_order' => 0,
    ));
}


?>```