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What is the purpose of the hooks.php file in CodeIgniter? - Code Stap
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What is the purpose of the hooks.php file in CodeIgniter?

What is the purpose of the hooks.php file in CodeIgniter?

The hooks.php file in CodeIgniter plays a crucial role in extending the framework’s functionality without altering its core files. Here’s a detailed explanation:

What are Hooks?

Hooks in CodeIgniter allow you to execute custom code at specific points during the execution of your application. This is particularly useful for modifying the behavior of the framework without directly changing its core code, ensuring that your customizations remain intact even after updates.

Where is the Hooks File Located?

The hooks are defined in the hooks.php file, which is located in the application/config directory of your CodeIgniter project. This file is where you can specify which hooks you want to utilize and what actions should be taken at each hook point.

How to Use Hooks?

  1. Enable Hooks: First, ensure that hooks are enabled in your config.php file by setting the enable_hooks configuration option to TRUE.

  2. Define Hook Points: In the hooks.php file, you can define various hooks. Each hook consists of:

    • Hook Point: A specific point in the application’s lifecycle where your code will run (e.g., before the controller is called, after the controller is executed, etc.).
    • Callback Function: The custom function you want to execute at that hook point.

Example

<?php
$hook['post_controller'][] = array(
    'class'    => '',
    'function' => 'my_custom_function',
    'filename' => 'my_custom_function.php',
    'filepath' => 'hooks',
    'params'   => array()
);
?>

  1. In this example, my_custom_function will run after the controller has been executed.

Benefits of Using Hooks

  • Modularity: Keeps your custom code separate from the core framework, promoting cleaner code and easier maintenance.
  • Flexibility: Allows for custom functionality to be added without rewriting existing code.
  • Upgradability: Reduces the risk of losing custom changes during framework updates.

By utilizing the hooks.php file effectively, you can enhance your CodeIgniter applications while maintaining the integrity of the core files.

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