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PHP code <?phpecho srandsalt();/*
    ·µ»ØËæ»ú×Ö·û´®»òÕßÊý×é
    Params:
        $count: ·µ»Ø¸öÊý
        $addchars: Ôö¼ÓÆäËûËæ»ú×Ö·û
        $arrayout: ÊÇ·ñÊý×éÊä³ö
        $unique: ÊÇ·ñÔÊÐíÖظ´*/function srandsalt($count=6,$addchars='',$arrayout=0,$unique=0)
{$wfile='existsCode.inc';$chars='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.$addchars;if ($unique)
    {$tmp=range(0,strlen($chars)-1);shuffle($tmp);$keys=array_slice($tmp,0,$count);unset($tmp);
    }else
    {$keys=array_rand(range(0,strlen($chars)-1),$count);
    }$buff=array();foreach($keysas$value)
    {$buff[]=$chars{$value};
    }//²»ÒªÇó·µ»ØÊý×éif (!$arrayout)
  &n