Disable Drupal (>=8.0) caching during development

Disabling Drupal 8 and Drupal 9 hoard ( render hoard, dynamic page cache, Twig hoard ) during exploitation is useful for seeing changes without clearing the hoard .
IMPORTANT NOTE: Accessing the site as an anonymous exploiter even makes habit of caching even when local development settings have been enabled. You must be logged in to view your site with caches disabled .

Load local development settings

Include the local settings file as part of Drupal ‘s settings file .
Copy sites/example.settings.local.php to sites/default/settings.local.php :

$ cp sites/example.settings.local.php sites/default/settings.local.php

assailable settings.php file in sites/default and uncomment these lines :

if (file_exists($app_root. '/'. $site_path. '/settings.local.php')) {
include $app_root. '/'. $site_path. '/settings.local.php';
}

Configure development.services.yml

The development.services.yml charge is located under /sites .
Your final development.services.yml should look as follows ( mind the indentation ) :

# Local development services.
#
# To activate this feature, follow the instructions at the top of the
# 'example.settings.local.php' file, which sits next to this file.
parameters:
http.response.debug_cacheability_headers: true
twig.config:
debug: true
auto_reload: true
cache: false
services:
cache.backend.null:
class: Drupal\Core\Cache\NullBackendFactory

Twig cache: We added a twig.config section in the development.services.yml disabling the hoard. You can reactivate the catch on cache by settings debug and auto_reload to true..
open settings.local.php and make certain development.services.yml is enabled .

$settings['container_yamls'][] = DRUPAL_ROOT. '/sites/development.services.yml';

Beware of scaffolding

Depending on your composer.json, development.services.yml may be overwritten from during scaffolding. To prevent certain scaffold files from being overwritten every time you run a Composer command you need to specify them one by one in the “ extra ” section of your project ‘s composer.json. See the doctor on Excluding scaffold files .
The trace snip prevents the development.services.yml from being regularly overwritten :

"drupal-scaffold": {
"locations": {
"web-root": "web/"
},
"file-mapping": {
"[web-root]/sites/development.services.yml": false
}
},

Configure settings.local.php

Change the follow to be TRUE if you want to work with enable css- and js-aggregation :

$config['system.performance']['css']['preprocess'] = FALSE;
$config['system.performance']['js']['preprocess'] = FALSE;

Uncomment these lines to disable the render cache and disable dynamic page hoard :

$settings['cache']['bins']['render'] = 'cache.backend.null';
$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';

Add the follow lines

$settings['cache']['bins']['page'] = 'cache.backend.null';

If you do not want to install test modules and themes, set the surveil to FALSE :

$settings['extension_discovery_scan_tests'] = FALSE;

Rebuild cache

Rebuild the Drupal hoard otherwise your web site will encounter an unexpected error on page recharge. This can be done by with drush :

drush cr

or by visiting the following URL from your Drupal 8-9 web site :

http://yoursite/core/rebuild.php

Use Drupal Console development mode

You can use Drupal Console to switch locate into development mode and back to production modality with the locate : mode command
Because Drupal Console is not disabling all the possible caches mechanically for you. so manual edits in your configuration might even be needed .
Example :

drupal site:mode dev

Find cache bins

To find all available ( but not inevitably enabled ) cache bins :

find. -type f -name *.services.yml | \
xargs sed -E -n  's/.*cache\.(.*):.*/\1/p' | \
grep -v "backend\|html.twig" | \
sort -u | \
awk -vORS=\',\' '{ print $1 }' | \
sed "s/,'$//" | sed "s/^/'/"

note that in OSX you might need to install and run ‘gawk ‘ rather of ‘awk ‘ in order for the above command to work. You can use brew to install goggle :

brew install gawk

then you could copy/paste it in your settings.php file and disable hoard like this :

$cache_bins = array('bootstrap','config','data','default','discovery','dynamic_page_cache','entity','menu','migrate','render','rest','static','toolbar');
foreach ($cache_bins as $bin) {
$settings['cache']['bins'][$bin] = 'cache.backend.null';
}

Alternative: develop with caching enabled

Disabling hoard has some drawbacks. The wholly site responds slower, and rebuilding all caches takes a while besides. Doing this a batch, and all those seconds waiting for a reply add up. For an access to developing with the cache enabled, see Drupal 8 development with caching on .

Sendfile Settings

sometimes local install environments will have Sendfile enable in their server configuration. Sendfile is used by the server to cache electrostatic files, and can greatly improve performance on production environments. however, during growth, this can cause CSS and Javascript files to be served from the cache, rather than a fresh imitate. You can set Sendfile to off, depending on the environment ‘s web server ( Apache or Nginx ).

Apache requires an update in the httpd.conf ( or sometimes apache.conf )
EnableSendfile off
Nginx requires an update in the nginx.conf
sendfile off

PHP OpCode Caches

sometimes your latest changes within your PHP files might not be reflected on your web page due to caches via PHP extensions. One popular PHP code cache is the PHP OpCode extension. Drupal recommends you to enable the PHP OpCode extension for faster code execution. however, it can be sometimes confusing when you want to see the latest changes in your PHP code reflected in your webbrowser or any dominate occupation script ( e.g. Drush command ). sol if you are uncertain about your code performance during your development process, disabling or configuring the PHP OpCode extension might be a solution. Be mindful that the PHP OpCode extension is n’t largely the reason for caches in your development process. Read more about PHP OpCode caches in the adopt web log article : PHP performance I : Everything You Need to Know About OpCode Caches .
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reference : https://shoppingandreview.com
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