function postedit(){
$this->load->helper("url");
$this->load->helper("form");
//$sql = "select * from userinfo where username = 'zhangning'";
$data["user"] = $this->db->query("select * from userinfo where username = '".$this->uri->segment(3)."'");
$this->load->view("postedit",$data);
}前台：
<?php echo $user->Age ?>A PHP Error was encounteredSeverity: NoticeMessage: Undefined property: CI_DB_mysql_result::$AgeFilename: views/postedit.phpLine Number: 9啥原因呀？找了半天了刚学2 3天。。看不出来哪有错。
$data["user"] ="fsdfsd";如果这样前台会输出值得
你的query只是查询，并未返回结果啊，你看看ci手册
在System文件下下的DataBase文件夹下/**
* Execute the query
*
* Accepts an SQL string as input and returns a result object upon
* successful execution of a "read" type query. Returns boolean TRUE
* upon successful execution of a "write" type query. Returns boolean
* FALSE upon failure, and if the $db_debug variable is set to TRUE
* will raise an error.
*
* @access public
* @param string An SQL query string
* @param array An array of binding data
* @return mixed
*/
function query($sql, $binds = FALSE, $return_object = TRUE)
{
if ($sql == '')
{
if ($this->db_debug)
{
log_message('error', 'Invalid query: '.$sql);
return $this->display_error('db_invalid_query');
}
return FALSE;
} // Verify table prefix and replace if necessary
if ( ($this->dbprefix != '' AND $this->swap_pre != '') AND ($this->dbprefix != $this->swap_pre) )
{
$sql = preg_replace("/(\W)".$this->swap_pre."(\S+?)/", "\\1".$this->dbprefix."\\2", $sql);
} // Compile binds if needed
if ($binds !== FALSE)
{
$sql = $this->compile_binds($sql, $binds);
} // Is query caching enabled? If the query is a "read type"
// we will load the caching class and return the previously
// cached query if it exists
if ($this->cache_on == TRUE AND stristr($sql, 'SELECT'))
{
if ($this->_cache_init())
{
$this->load_rdriver();
if (FALSE !== ($cache = $this->CACHE->read($sql)))
{
return $cache;
}
}
} // Save the query for debugging
if ($this->save_queries == TRUE)
{
$this->queries[] = $sql;
} // Start the Query Timer
$time_start = list($sm, $ss) = explode(' ', microtime()); // Run the Query
if (FALSE === ($this->result_id = $this->simple_query($sql)))
{
if ($this->save_queries == TRUE)
{
$this->query_times[] = 0;
} // This will trigger a rollback if transactions are being used
$this->_trans_status = FALSE; if ($this->db_debug)
{
// grab the error number and message now, as we might run some
// additional queries before displaying the error
$error_no = $this->_error_number();
$error_msg = $this->_error_message(); // We call this function in order to roll-back queries
// if transactions are enabled. If we don't call this here
// the error message will trigger an exit, causing the
// transactions to remain in limbo.
$this->trans_complete(); // Log and display errors
log_message('error', 'Query error: '.$error_msg);
return $this->display_error(
array(
'Error Number: '.$error_no,
$error_msg,
$sql
)
);
} return FALSE;
} // Stop and aggregate the query time results
$time_end = list($em, $es) = explode(' ', microtime());
$this->bench += ($em + $es) - ($sm + $ss); if ($this->save_queries == TRUE)
{
$this->query_times[] = ($em + $es) - ($sm + $ss);
} // Increment the query counter
$this->query_count++; // Was the query a "write" type?
// If so we'll simply return true
if ($this->is_write_type($sql) === TRUE)
{
// If caching is enabled we'll auto-cleanup any
// existing files related to this particular URI
if ($this->cache_on == TRUE AND $this->cache_autodel == TRUE AND $this->_cache_init())
{
$this->CACHE->delete();
} return TRUE;
} // Return TRUE if we don't need to create a result object
// Currently only the Oracle driver uses this when stored
// procedures are used
if ($return_object !== TRUE)
{
return TRUE;
} // Load and instantiate the result driver $driver = $this->load_rdriver();
$RES = new $driver();
$RES->conn_id = $this->conn_id;
$RES->result_id = $this->result_id; if ($this->dbdriver == 'oci8')
{
$RES->stmt_id = $this->stmt_id;
$RES->curs_id = NULL;
$RES->limit_used = $this->limit_used;
$this->stmt_id = FALSE;
} // oci8 vars must be set before calling this
$RES->num_rows = $RES->num_rows(); // Is query caching enabled? If so, we'll serialize the
// result object and save it to a cache file.
if ($this->cache_on == TRUE AND $this->_cache_init())
{
// We'll create a new instance of the result object
// only without the platform specific driver since
// we can't use it with cached data (the query result
// resource ID won't be any good once we've cached the
// result object, so we'll have to compile the data
// and save it)
$CR = new CI_DB_result();
$CR->num_rows = $RES->num_rows();
$CR->result_object = $RES->result_object();
$CR->result_array = $RES->result_array(); // Reset these since cached objects can not utilize resource IDs.
$CR->conn_id = NULL;
$CR->result_id = NULL; $this->CACHE->write($sql, $CR);
} return $RES;
}
你的 $user->Age 是查询结果（$data["user"] = $this->db->query("select * from use ....）
如果能写成这样的话，那么对应的字段名一定也要是 Age，但一般都不这么写，只是习惯性的一律小写
还是自己不熟悉php原因
这些东西应该多看CI 多练就行 灰常感谢2位！！