CodeIgniter 模型的一个特点

反复调用
$this->load->model("someModel");
$this->load->model("someModel");
$this->load->model("someModel");
model 函数有规避机制,即仅调用一次。

多发一点啊......

呵呵,一定多发!
不过还需要大家一起努力啊!

飘过。
。。。

本帖最后由 phper08 于 2013年9月7日 21:24 编辑

public function model($model, $name = '', $db_conn = FALSE)
{
if (is_array($model))
{
foreach ($model as $babe)
{
$this->model($babe);
}
return;
}

if ($model == '')
{
return;
}

$path = '';

// Is the model in a sub-folder? If so, parse out the filename and path.
if (($last_slash = strrpos($model, '/')) !== FALSE)
{
// The path is in front of the last slash
$path = substr($model, 0, $last_slash + 1);

// And the model name behind it
$model = substr($model, $last_slash + 1);
}

if ($name == '')
{
$name = $model;
}

if (in_array($name, $this->_ci_models, TRUE))
{
return;
}

$CI =& get_instance();
if (isset($CI->$name))
{
show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
}

$model = strtolower($model);

foreach ($this->_ci_model_paths as $mod_path)
{
if ( ! file_exists($mod_path.'models/'.$path.$model.'.php'))
{
continue;
}

if ($db_conn !== FALSE AND ! class_exists('CI_DB'))
{
if ($db_conn === TRUE)
{
$db_conn = '';
}

$CI->load->database($db_conn, FALSE, TRUE);
}

if ( ! class_exists('CI_Model'))
{
load_class('Model', 'core');
}

require_once($mod_path.'models/'.$path.$model.'.php');

$model = ucfirst($model);

$CI->$name = new $model();

$this->_ci_models[] = $name;
return;
}

// couldn't find the model
show_error('Unable to locate the model you have specified: '.$model);
}

所谓的规避机制就是把类名放到一个数组里吧