Detailed explanation of the usage of CodeIgniter auxiliary function helper

$this->load->helper('name');

where name is the name of the helper function file (without the .php suffix and "helper" part).

For example, to load the URL Helper with the file name url_helper.php, you can use the following statement:

$this->load->helper('url');

Helper functions can be loaded anywhere in your controller, even Loaded in the View file (we don't recommend this). Please load helper functions before using them. You can load them in your controller constructor so that helper functions are automatically loaded before other functions. You can also load helper functions where they are needed.

Note: The helper function loading function does not return a value, so don't try to assign it to a variable, just use it like this.

3. Load multiple auxiliary functions If you want to load multiple helper functions at once, you can do this:

$this->load->helper( array('helper1', 'helper2', 'helper3') );

4, automatically load the helper function CodeIgniter can automatically load helper functions for you if you want. You can do this by opening application/config/autoload.php and adding helper functions to the autoload array.

5, use auxiliary functions Once you have loaded the helper function file you want to use, you can use the standard function calling method to use the functions inside. For example, to use the anchor() function to create a link, in a View file you would do this: " blog/comments" is the URI of the link. (Collected and organized by Programmer’s Home bbs.it-home.org) Note: It is best to follow naming conventions for function names in auxiliary functions. If multiple auxiliary function files are loaded at the same time and there are functions with the same name, it will cause a blank page problem in CI (this is also a PHP syntax error).

// any_in_array() is not in the Array Helper, so it defines a new function

{

if (in_array($item, $haystack))

{

return TRUE;

}

// random_element () is included in Array Helper, so it overrides the native function
function random_element($array)
{
 shuffle($array);
 return array_pop($array);
}



Copy code


7 , set the prefix (Prefix)
Prefixed files used to "extend" helpers are also extensions to libraries and core classes.
In order to set a custom prefix, please open the application/config/config.php file and find:





$config['subclass_prefix'] = 'MY_';