如何使用CodeIgniter的set_value作爲數組的字段？

Question

我有一個標籤爲「amenities []」的下拉列表，它是一個數組。當我使用CodeIgniter的form_validation時，我想使用set_value正確地重新填充它，但我無法。任何人對此有任何意見？

Answer 1

縱觀源Codeignitor 1.7.2 SET_VALUE實現：

/** 
* Get the value from a form 
* 
* Permits you to repopulate a form field with the value it was submitted 
* with, or, if that value doesn't exist, with the default 
* 
* @access public 
* @param string the field name 
* @param string 
* @return void 
*/ 
function set_value($field = '', $default = '') 
{ 
    if (! isset($this->_field_data[$field])) 
    { 
     return $default; 
    } 

    return $this->_field_data[$field]['postdata']; 
} 

注意它不支持數組。另一方面，Codeignitor的set_select確實支持陣列：

// -------------------------------------------------------------------- 

/** 
* Set Select 
* 
* Enables pull-down lists to be set to the value the user 
* selected in the event of an error 
* 
* @access public 
* @param string 
* @param string 
* @return string 
*/ 
function set_select($field = '', $value = '', $default = FALSE) 
{  
    if (! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata'])) 
    { 
     if ($default === TRUE AND count($this->_field_data) === 0) 
     { 
      return ' selected="selected"'; 
     } 
     return ''; 
    } 

    $field = $this->_field_data[$field]['postdata']; 

    if (is_array($field)) 
    { 
     if (! in_array($value, $field)) 
     { 
      return ''; 
     } 
    } 
    else 
    { 
     if (($field == '' OR $value == '') OR ($field != $value)) 
     { 
      return ''; 
     } 
    } 

    return ' selected="selected"'; 
}