上下文搜索.swf 在核心，在/wp-admin/includes/media.php:

$plupload_init = array(
    \'runtimes\' => \'html5,silverlight,flash,html4\',
    \'browse_button\' => \'plupload-browse-button\',
    \'container\' => \'plupload-upload-ui\',
    \'drop_element\' => \'drag-drop-area\',
    \'file_data_name\' => \'async-upload\',
    \'multiple_queues\' => true,
    \'max_file_size\' => $max_upload_size . \'b\',
    \'url\' => $upload_action_url,
    \'flash_swf_url\' => includes_url(\'js/plupload/plupload.flash.swf\'),
    \'silverlight_xap_url\' => includes_url(\'js/plupload/plupload.silverlight.xap\'),
    \'filters\' => array( array(\'title\' => __( \'Allowed Files\' ), \'extensions\' => \'*\') ),
    \'multipart\' => true,
    \'urlstream_upload\' => true,
    \'multipart_params\' => $post_params
);

$plupload_init = apply_filters( \'plupload_init\', $plupload_init );

应用以下过滤器挂钩似乎可以完成此工作：^{（在WP 3.4.1中）}

add_filter(\'plupload_init\', \'wpse_38603_flash_uploader\', 10, 1);

function wpse_38603_flash_uploader( $plupload_init )
{
    $plupload_init[\'runtimes\'] = \'flash,html5,silverlight,html4\';
    return $plupload_init;
}

您可以在php中检查文件大小。ini并增加它，这可能是一个原因，而不是你可以尝试this plugin