with Franz Josef Kaiser
Use the right tool for the job.
Don't stuff everything in your themes functions.php file.
| File | Type of Plugin | Loaded | Context |
|---|---|---|---|
| Source Hakre | |||
advanced-cache.php |
Advanced caching plugin. | on WP_CACHE value |
Single |
db.php |
Custom database class | always | Single |
db-error.php |
Custom database error message | on error | Single |
install.php |
Custom install script | on install | Single |
maintenance.php |
Custom maintenance message | on maintenance | Single |
object-cache.php |
External object cache | always | Single |
sunrise.php |
Executed before Multisite is loaded | on SUNRISE value |
Multi |
blog-deleted.php |
Custom blog deleted message | on deleted blog | Multi |
blog-inactive.php |
Custom blog inactive message | on inactive blog | Multi |
blog-suspended.php |
Custom blog suspended message | on archived or spammed blog | Multi |
db-error.php
Improve upon core. Make it better, faster, more reliable.
Plain PHP files that need no Plugin header comment block.
Drop! them in your wp-content folder, or whatever you named it.
Example ~/wp-content/db-error.php file: Send a 503 header
to avoid loosing page rank.
$protocol = $_SERVER["SERVER_PROTOCOL"];
if (
'HTTP/1.1' != $protocol
AND 'HTTP/1.0' != $protocol
)
$protocol = 'HTTP/1.0';
header( "{$protocol} 503 Service Unavailable", true, 503 );
header( 'Content-Type: text/html; charset=utf-8' );
header( 'Retry-After: 600' );
Ever found a small snippet that you wanted to throw in your functions.php?
Users, Use a MU Plugin for that!
If you ain't got a mu-plugins folder in your wp-content dir: simply add one. It's safe.
Disable the capital_P_dangit filter callback.
# No direct file access without WP core loaded.
defined( 'ABSPATH' ) OR exit;
/**
* Plugin Name: Disable »capitalPdangit«
* Description: My content is my content. Don't mess with it.
* Author: Franz Josef Kaiser (wecodemore[at]gmail.com)
* Author URl: http://unserkaiser.com
* License: MIT
*/
add_action( 'muplugins_loaded', 'NO_capital_P_dangit', 5 );
function NO_capital_P_dangit()
{
foreach (
array( 'the_content', 'the_title', 'comment_text' )
as $filter
)
remove_filter( $filter, 'capital_P_dangit' );
}
Or: What this talk is about.
Errors are for development, not for production. Don't leave it to your users to find out your mistakes. #
define( 'DS', DIRECTORY_SEPARATOR ); # ================================== # PHP errors & log: Drop what you don't need. error_reporting( E_ALL | E_STRICT | E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR ); @ini_set( 'display_errors', 1 ); @ini_set( 'log_errors', 1 ); # ================================== # DEBUG define( 'WP_DEBUG', true ); // file: ~/WP_CONTENT_DIR/debug.log define( 'WP_DEBUG_LOG', true ); define( 'WP_DEBUG_DISPLAY', true ); define( 'SAVEQUERIES', true ); # DEBUG: MU define( 'DIEONDBERROR', true ); define( 'ERRORLOGFILE', WP_CONTENT_DIR.DS.'logs'.DS.'mu_error.log' ); # PHP Error log location @ini_set( 'error_log', WP_CONTENT_DIR.DS.'logs'.DS.'php_error.log' );
Users: Be nice, and ♥ your developer. Provide meaningful error reports - use the paranoia setup if something is not working.
phpinfo(); in a mu-plugin to give the developer info about your server setup.Voted: 1/5 *
Review:
Taxes bug! このEasy Digital Downloads のプラグインは、プライス20,000.以上で 税金計算のバグが有ります。 実際にご確認ください。 プライス20,000. 税金5 % 制作者に連絡しても駄目でした。 なので、Rating は、1.
Source: Pippin Williamson "Easy Digital Downloads" Plugin at the wp.org repo.
Throwing things into the global namespace is like driving on the wrong side of the street to see what happens. Safe a day, avoid collisions.
define( 'VERSION', 1.0 );$facepalm = new FacePalm::init();class wpm_vie_PLUGINAvoid hacking core files. There's an API to do it. The difference between actions and filters.
Action: do_action( 'name', $additional_arguments );
Filter: apply_filters( 'name', $minimum_argument, $additional_arguments );
MU-Plugins, Plugins and Themes: each group has their own hook.
muplugins_loadedplugins_loadedafter_setup_themeHook in once, with a priority lower than 10, so others have a chance to modify them with the default priority of 10.
Example: The
WCM Current Admin Info Plugin.
Hooks in at plugins_loaded to load all files.
defined( 'ABSPATH' ) OR exit;
/**
* Plugin Name: Current admin screen info
* Author: Franz Josef Kaiser (wecodemore[at]gmail.com)
*/
add_action( 'plugins_loaded', array( 'WCM_CSD', 'init' ), 5 );
final class WCM_CSD
{
private static $instance;
public static function init()
{
is_null( self::$instance )
AND self::$instance = new self;
return self::$instance;
}
public function __construct()
{
$files = glob(plugin_dir_path(__FILE__).'inc/*.php');
foreach ( $files as $file )
require_once $file;
}
}
Fatal error: Allowed memory size of *** bytes exhausted…
This is what your users get: The white screen of † death!
Happens mostly on the ~/wp-admin/dashboard.php for shared hosts.
Tells us, that a lot of crappy plugins didn't care about where they load themselves.
get_current_screen()
# object for admin pages.$plugin_page = add_menu_page() returns the page hook.do_action( "load-{$plugin_page}" );
Requests need time, scripts and files use memory.
add_action( 'admin_enqueue_scripts', 'wpm_vie_enqueue' );
function wpm_vie_enqueue( $hook )
{
in_array( $hook, array( 'post.php', 'post-new.php' ) )
AND wp_enqueue_script( 'vienna' );
}
Sometimes, "Give me an option!" is like…
Don't feel bad if you offer no options at all.
Advantages of no options: Less chances to…
Do one job, but do it right.
A short (an incomplete) list of developers doing it right.… in alphabetical order.
Franz Josef Kaiser
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