Размер файла.

<informationsystem_item id="216">
      <informationsystem_id>22</informationsystem_id>
      <informationsystem_group_id>0</informationsystem_group_id>
      <shortcut_id>0</shortcut_id>
      <name>тест2</name>
      <description></description>
      <active>1</active>
      <image_large></image_large>
      <image_small></image_small>
      <image_large_width></image_large_width>
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      <image_small_width></image_small_width>
      <image_small_height></image_small_height>
      <sorting>0</sorting>
      <ip>109.205.253.124</ip>
      <path>216</path>
      <indexing>1</indexing>
      <seo_title></seo_title>
      <seo_description></seo_description>
      <seo_keywords></seo_keywords>
      <siteuser_group_id>-1</siteuser_group_id>
      <showed>0</showed>
      <user_id>19</user_id>
      <siteuser_id>0</siteuser_id>
      <deleted>0</deleted>
      <url>/mediagrafiia/audio/216/</url>
      <date>05.11.2012</date>
      <datetime>05.11.2012 09:18:24</datetime>
      <start_datetime>0000-00-00 00:00:00</start_datetime>
      <end_datetime>0000-00-00 00:00:00</end_datetime>
      <dir>/upload/deleuzeruinformation_system_22/2/1/6/item_216/</dir>
      <comments_count>0</comments_count>
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         <file_small_description></file_small_description>
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         <tag_name>audio</tag_name>
         <file></file>
         <file_small></file_small>
      </property_value>
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$kernel->available_extantions = array ('JPG','JPEG','GIF','PNG','PDF','MP3','AVI','WAV','MIDI','TXT');