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function uhtml($str) 

    $farr = array( 
        "/\s+/", //¹ýÂ˶àÓà¿Õ°× 
         //¹ýÂË <script>µÈ¿ÉÄÜÒýÈë¶ñÒâÄÚÈÝ»ò¶ñÒâ¸Ä±äÏÔʾ²¼¾ÖµÄ´úÂë,Èç¹û²»ÐèÒª²åÈëflashµÈ,»¹¿ÉÒÔ¼ÓÈë<object>µÄ¹ýÂË 
        "/<(\/?)(script|i?frame|style|html|body|title|link|meta|\?|\%)([^>]*?)>/isU",
        "/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU",//¹ýÂËjavascriptµÄonʼþ 
   ); 
   $tarr = array( 
        " ", 
        "£¼\1\2\3£¾",//Èç¹ûÒªÖ±½ÓÇå³ý²»°²È«µÄ±êÇ©£¬ÕâÀï¿ÉÒÔÁô¿Õ 
        "\1\2", 
   ); 
  $str = preg_replace( $farr,$tarr,$str); 
   return $str; 
}


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