wp-fluent-form-extra-file-extensions.php

add_filter('fluentform_file_type_options', function ($types) {
    $types[] = [
        'label' => __('3d files - DWG, STL, STEP, STP, SKP, MAX, FBX, 3DS, IGES, OBJ', 'fluentform'),
        'value' => 'dwg|stp|stl|STEP|skp|max|fbx|3ds|iges|obj',
    ];
    return $types;
});

add_filter('upload_mimes', function ($mime_types) {
    $mime_types ['dwg'] = 'image/vnd.dwg';
    $mime_types ['stl'] = 'application/sla';
    $mime_types ['step'] = 'application/p21';
    $mime_types ['stp'] = 'application/p21';
    $mime_types ['skp'] = 'application/x-koan';
    $mime_types ['max'] = 'application/x-paperport';
    $mime_types ['fbx'] = 'application/x-fortran';
    $mime_types ['3ds'] = 'image/x-3ds';
    $mime_types ['iges'] = 'model/iges';
    $mime_types ['obj'] = 'application/x-tgif';
    
    return $mime_types;
}, 1, 1);
add_action('fluentform_starting_file_upload', function () {
    add_filter('fluentform_uploader_args', function ($args) {
        $args['test_type'] = false;
        return $args;
    });
});

//http req
add_filter('ff_default_file_extensions', function ($mime_types) {
    $newTypes = [
        'application/msword' => 'max',
        'application/x-fortran' => 'fbx',
        'application/p21' => 'step',
        'model/iges' => 'iges',
        'application/x-koan' => 'skp',
        'application/sla' => 'stl',
        'text/plain' => 'obj',
    ];
    $mime_types = array_merge($newTypes, $mime_types);
    return $mime_types;
}, 1, 1);