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How do you use query caching in CodeIgniter?

How do you use query caching in CodeIgniter?

Query Caching in CodeIgniter

What is Query Caching? Query caching is a technique used to store the results of database queries so that repeated requests for the same data can be served faster. Instead of executing the same query multiple times, the application retrieves the results from the cache, which significantly improves performance.

How to Enable Query Caching:

  1. Turn on Caching: Before executing a query, you can enable query caching by calling:

Example

<?php
$this->db->cache_on();
?>

  • This tells CodeIgniter to start caching the results of the upcoming query.

  • Execute Your Query: After enabling caching, run your database query as usual:

Example

<?php
$query = $this->db->get('your_table_name');
?>

  • This tells CodeIgniter to start caching the results of the upcoming query.

  • Execute Your Query: After enabling caching, run your database query as usual:

Example

<?php
$query = $this->db->get('your_table_name');
?>

Turn off Caching: Once you’ve executed the query and fetched the results, you should disable caching by calling:

Example

<?php
$this->db->cache_off();
?>

  1. This ensures that only the specific query results you want are cached, preventing unexpected behavior in subsequent queries.

Benefits of Query Caching:

  • Improved Performance: Reduces the time taken to retrieve data from the database by using cached results.
  • Reduced Database Load: Lowers the number of queries sent to the database, which can help prevent performance bottlenecks, especially under heavy load.

Example

<?php
// Enable query caching
$this->db->cache_on();

// Execute a query
$query = $this->db->get('your_table_name');

// Turn off query caching
$this->db->cache_off();

// Process the results
foreach ($query->result() as $row) {
    // Do something with $row
}
?>

Using query caching effectively can lead to a more efficient application by speeding up data retrieval and reducing the strain on your database.

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