Config Class: The Config class provides means to retrieve configuration preferences. The config items in Codeigniter can be set and get in the environment. The config value $this->config can be used to get and set items in the environment. The config items are contained within an array, namely, $config. The config file is stored at “application/config/config.php“, which may provide opportunities to add new items or create a separate entity of configuration items.
CodeIgniter by default loads the primary config file (application/config/config.php), whereas the custom files need to be externally loaded.
Setting config variable value: The config variable in CodeIgniter can be set in the environment using the following two methods. The config class method set_item() is used to set the value of a variable in Codeigniter. The set_item() can be used to dynamically set a config item or modify an existing one.
Syntax:
$this->config->set_item('item_name', 'item_value');
Arguments:
- item_name: $config array item name to be changed.
- item_value: The value to be changed.
PHP
<?php // Setting the value of config variable $this->config->set_item('str', "Hello GFG!"); echo($this->config->item('str')); ?> |
Output:
[1] "Hello GFG!"
The config item can also be modified or initialized using the key-value pair defined in the $config variable. The item value of the config variable can also be set using the key-value pair in CodeIgniter.
PHP
<?php $config['str'] = "Hello GFG!"; echo($this->config->item('str')); ?> |
Output:
[1] "Hello GFG!"
Getting config variable value: The config items can also be easily fetched from the CodeIgniter environment. The config class function item() is used to get the value of a config variable in Codeigniter.
Syntax:
$this->config->item('item_name');
Arguments:
- item_name: $config array index to be retrieved.
Return Value: This function returns a value of the array index key specified, or NULL if no such key exists.
PHP
<?php // Getting the value of config variable $this->config->item('str'); ?> |
Output:
[1] "Hello GFG!"
