diff options
| -rw-r--r-- | user_guide_src/source/general/core_classes.rst | 29 | ||||
| -rw-r--r-- | user_guide_src/source/general/creating_libraries.rst | 55 | ||||
| -rw-r--r-- | user_guide_src/source/general/drivers.rst | 3 | ||||
| -rw-r--r-- | user_guide_src/source/general/errors.rst | 11 |
4 files changed, 84 insertions, 14 deletions
diff --git a/user_guide_src/source/general/core_classes.rst b/user_guide_src/source/general/core_classes.rst index 8cd3a93dc..ac41407f7 100644 --- a/user_guide_src/source/general/core_classes.rst +++ b/user_guide_src/source/general/core_classes.rst @@ -50,7 +50,9 @@ instead of the one normally used. Please note that your class must use CI as a prefix. For example, if your file is named Input.php the class will be named:: - class CI_Input { } + class CI_Input { + + } Extending Core Class ==================== @@ -68,12 +70,20 @@ couple exceptions: For example, to extend the native Input class you'll create a file named application/core/MY_Input.php, and declare your class with:: - class MY_Input extends CI_Input { } + class MY_Input extends CI_Input { + + } Note: If you need to use a constructor in your class make sure you extend the parent constructor:: - class MY_Input extends CI_Input { function __construct() { parent::__construct(); } } + class MY_Input extends CI_Input { + + function __construct() + { + parent::__construct(); + } + } **Tip:** Any functions in your class that are named identically to the functions in the parent class will be used instead of the native ones @@ -85,7 +95,18 @@ your new class in your application controller's constructors. :: - class Welcome extends MY_Controller { function __construct() { parent::__construct(); } function index() { $this->load->view('welcome_message'); } } + class Welcome extends MY_Controller { + + function __construct() + { + parent::__construct(); + } + + function index() + { + $this->load->view('welcome_message'); + } + } Setting Your Own Prefix ----------------------- diff --git a/user_guide_src/source/general/creating_libraries.rst b/user_guide_src/source/general/creating_libraries.rst index d322f56eb..bc545b483 100644 --- a/user_guide_src/source/general/creating_libraries.rst +++ b/user_guide_src/source/general/creating_libraries.rst @@ -45,7 +45,16 @@ The Class File Classes should have this basic prototype (Note: We are using the name Someclass purely as an example):: - <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Someclass { public function some_function() { } } /* End of file Someclass.php */ + <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); + + class Someclass { + + public function some_function() + { + } + } + + /* End of file Someclass.php */ Using Your Class ================ @@ -70,12 +79,24 @@ In the library loading function you can dynamically pass data as an array via the second parameter and it will be passed to your class constructor:: - $params = array('type' => 'large', 'color' => 'red'); $this->load->library('Someclass', $params); + $params = array('type' => 'large', 'color' => 'red'); + + $this->load->library('Someclass', $params); If you use this feature you must set up your class constructor to expect data:: - <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Someclass { public function __construct($params) { // Do something with $params } } ?> + <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); + + class Someclass { + + public function __construct($params) + { + // Do something with $params + } + } + + ?> You can also pass parameters stored in a config file. Simply create a config file named identically to the class file name and store it in @@ -93,7 +114,10 @@ object. Normally from within your controller functions you will call any of the available CodeIgniter functions using the $this construct:: - $this->load->helper('url'); $this->load->library('session'); $this->config->item('base_url'); etc. + $this->load->helper('url'); + $this->load->library('session'); + $this->config->item('base_url'); + // etc. $this, however, only works directly within your controllers, your models, or your views. If you would like to use CodeIgniter's classes @@ -106,7 +130,12 @@ First, assign the CodeIgniter object to a variable:: Once you've assigned the object to a variable, you'll use that variable *instead* of $this:: - $CI =& get_instance(); $CI->load->helper('url'); $CI->load->library('session'); $CI->config->item('base_url'); etc. + $CI =& get_instance(); + + $CI->load->helper('url'); + $CI->load->library('session'); + $CI->config->item('base_url'); + // etc. .. note:: You'll notice that the above get_instance() function is being passed by reference:: @@ -126,7 +155,9 @@ same as the native library. For example, to replace the native Email library you'll create a file named application/libraries/Email.php, and declare your class with:: - class CI_Email { } + class CI_Email { + + } Note that most native classes are prefixed with CI\_. @@ -153,12 +184,20 @@ couple exceptions: For example, to extend the native Email class you'll create a file named application/libraries/MY_Email.php, and declare your class with:: - class MY_Email extends CI_Email { } + class MY_Email extends CI_Email { + + } Note: If you need to use a constructor in your class make sure you extend the parent constructor:: - class MY_Email extends CI_Email { public function __construct() { parent::__construct(); } } + class MY_Email extends CI_Email { + + public function __construct() + { + parent::__construct(); + } + } Loading Your Sub-class ---------------------- diff --git a/user_guide_src/source/general/drivers.rst b/user_guide_src/source/general/drivers.rst index 8d0d84aaa..e2ded62e2 100644 --- a/user_guide_src/source/general/drivers.rst +++ b/user_guide_src/source/general/drivers.rst @@ -30,7 +30,8 @@ Methods of that class can then be invoked with:: The child classes, the drivers themselves, can then be called directly through the parent class, without initializing them:: - $this->some_parent->child_one->some_method(); $this->some_parent->child_two->another_method(); + $this->some_parent->child_one->some_method(); + $this->some_parent->child_two->another_method(); Creating Your Own Drivers ========================= diff --git a/user_guide_src/source/general/errors.rst b/user_guide_src/source/general/errors.rst index 0764e9db8..91b59140f 100644 --- a/user_guide_src/source/general/errors.rst +++ b/user_guide_src/source/general/errors.rst @@ -54,7 +54,16 @@ one of three "levels" in the first parameter, indicating what type of message it is (debug, error, info), with the message itself in the second parameter. Example:: - if ($some_var == "") { log_message('error', 'Some variable did not contain a value.'); } else { log_message('debug', 'Some variable was correctly set'); } log_message('info', 'The purpose of some variable is to provide some value.'); + if ($some_var == "") + { + log_message('error', 'Some variable did not contain a value.'); + } + else + { + log_message('debug', 'Some variable was correctly set'); + } + + log_message('info', 'The purpose of some variable is to provide some value.'); There are three message types: |