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Diffstat (limited to 'user_guide_src/source/general/helpers.rst')
| -rw-r--r-- | user_guide_src/source/general/helpers.rst | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/user_guide_src/source/general/helpers.rst b/user_guide_src/source/general/helpers.rst index 71cb8b25a..3a98311a6 100644 --- a/user_guide_src/source/general/helpers.rst +++ b/user_guide_src/source/general/helpers.rst @@ -3,10 +3,10 @@ Helper Functions ################ Helpers, as the name suggests, help you with tasks. Each helper file is -simply a collection of functions in a particular category. There are URL -Helpers, that assist in creating links, there are Form Helpers that help -you create form elements, Text Helpers perform various text formatting -routines, Cookie Helpers set and read cookies, File Helpers help you +simply a collection of functions in a particular category. There are **URL +Helpers**, that assist in creating links, there are Form Helpers that help +you create form elements, **Text Helpers** perform various text formatting +routines, **Cookie Helpers** set and read cookies, File Helpers help you deal with files, etc. Unlike most other systems in CodeIgniter, Helpers are not written in an @@ -19,9 +19,9 @@ using a Helper is to load it. Once loaded, it becomes globally available in your :doc:`controller <../general/controllers>` and :doc:`views <../general/views>`. -Helpers are typically stored in your system/helpers, or -application/helpers directory. CodeIgniter will look first in your -application/helpers directory. If the directory does not exist or the +Helpers are typically stored in your **system/helpers**, or +**application/helpers directory**. CodeIgniter will look first in your +**application/helpers directory**. If the directory does not exist or the specified helper is not located there CI will instead look in your global system/helpers folder. @@ -32,11 +32,11 @@ Loading a helper file is quite simple using the following function:: $this->load->helper('name'); -Where name is the file name of the helper, without the .php file +Where **name** is the file name of the helper, without the .php file extension or the "helper" part. -For example, to load the URL Helper file, which is named -url_helper.php, you would do this:: +For example, to load the **URL Helper** file, which is named +**url_helper.php**, you would do this:: $this->load->helper('url'); @@ -63,9 +63,8 @@ Auto-loading Helpers If you find that you need a particular helper globally throughout your application, you can tell CodeIgniter to auto-load it during system -initialization. This is done by opening the -application/config/autoload.php file and adding the helper to the -autoload array. +initialization. This is done by opening the **application/config/autoload.php** +file and adding the helper to the autoload array. Using a Helper ============== @@ -84,8 +83,8 @@ URI to the controller/function you wish to link to. "Extending" Helpers =================== -To "extend" Helpers, create a file in your application/helpers/ folder -with an identical name to the existing Helper, but prefixed with MY\_ +To "extend" Helpers, create a file in your **application/helpers/** folder +with an identical name to the existing Helper, but prefixed with **MY\_** (this item is configurable. See below.). If all you need to do is add some functionality to an existing helper - @@ -98,8 +97,8 @@ sense. Under the hood, this gives you the ability to add to the functions a Helper provides, or to modify how the native Helper functions operate. -For example, to extend the native Array Helper you'll create a file -named application/helpers/MY_array_helper.php, and add or override +For example, to extend the native **Array Helper** you'll create a file +named **application/helpers/MY_array_helper.php**, and add or override functions:: // any_in_array() is not in the Array Helper, so it defines a new function @@ -130,11 +129,11 @@ Setting Your Own Prefix The filename prefix for "extending" Helpers is the same used to extend libraries and Core classes. To set your own prefix, open your -application/config/config.php file and look for this item:: +**application/config/config.php** file and look for this item:: $config['subclass_prefix'] = 'MY_'; -Please note that all native CodeIgniter libraries are prefixed with CI\_ +Please note that all native CodeIgniter libraries are prefixed with **CI\_** so DO NOT use that as your prefix. Now What? |