The Struggle is Real: Developing WordPress Plugins Daniel Simanek - PowerPoint PPT Presentation

The Struggle is Real: Developing WordPress Plugins Daniel Simanek <daniel.simanek@wisc.edu> Research and Graduate Education

Throwing Things Classes

Filter all the Things No Magic

Code like everyone Is Stupid Break the (WordPress) Glass

Vanilla WordPress Workflow Pending Draft Published

Hot Swap Workflow Pending Draft Published Parent Pending Draft Child

Object Classes

lunchbox->num_grapes = 4;

lunchbox->num_grapes = 4; The programming 101 idea of objects ...

black_box->get_child();

??

Fewer function parameters Less to remember

Function scoping plugin_function_prefix_function_name() plugin_function_prefix_foo() plugin_function_prefix_example() plugin_function_prefix_foo_bar() plugin_function_prefix_bar() plugin_function_prefix_test() plugin_function_prefix_do_something() plugin_function_prefix_my_amazing_function()

Function scoping $this->function_name() OR Class_Name::function_name()

Order And Structure

Readability And Maintainability

PHP Kinda Sucks ...

PHP Kinda Sucks ... http://phpsadness.com/

Return Value?

What is FALSE as an INT?

Don’t be like PHP ...

and pass errors in return values ...

and pass errors in return values ... Throw Exceptions!

What does PHP do if I don’t check for errors?

PHP keeps going, no matter what ...

Death by exception

Use Constants

… and not Magic Numbers

What are Magic Numbers?

What are Magic Numbers? if( $x == 32 ) for( range( 1, 52 ) as $card ) if( $x == ‘supercalifragilisticexpialidocious’ )

if( $x == 32 ) for( range( 1, 52 ) as $card ) if( $x == ‘supercalifragilisticexpialidocious’ ) Why are Magic Numbers bad?

Why are Magic Numbers bad? for( range( 1, $deck_size ) as $card ) if( $x == $freezing_point ) if( $x == $song_name )

Magic Numbers, WordPress Style $cat_id = 7; $post_id = 527; $user_id = 64;

Two versions of Constants Global Class

BYO Filters

Using apply_filters() apply_filters( ‘name_of_my_filter’, $value_to_be_filtered ); e.g. apply_filters( ‘hot_swap/use_cloning’, $cloning_enabled );

Naming Filters hot_swap/excluded_post_types hot_swap/use_cloning my_awesome_plugin/options/save search_plugin/results hot_pocket/remove_from_microwave

Only call apply_filters() once per filter

Break out of WordPress

Code like everyone is stupid

Code like everyone is stupid Objects/classes

Code like everyone is stupid Objects/classes Throwing exceptions

Code like everyone is stupid Constants Objects/classes Throwing exceptions

Questions?

The Struggle is Real: Developing WordPress Plugins Daniel Simanek <daniel.simanek@wisc.edu> Research and Graduate Education