Magento 2 Useful Methods Cheat Sheet by Bhavi

app/co­de/­Ven­dor­Nam­e/M­odu­leName	Basic module structure
regist­rat­ion.php	Module regist­ration file
etc/mo­dul­e.xml	Module config­uration file
etc/fr­ont­end­/ro­ute­s.xml	Define frontend routes
etc/ad­min­htm­l/r­out­es.xml	Define admin routes

execute()	Main controller action method
Result­Int­erface	Various result types (Json, Redirect, Page, etc.)
getReq­uest()	Retrieve request object
getRes­ponse()	Retrieve response object

di.xml	Define plugin config­ura­tions
before­Met­hod(), around­Met­hod(), afterM­eth­od():	Plugin methods
proceed()	Call the next method in the chain

bin/ma­gento module­:enable Vendor­_Module	Enable a module
bin/ma­gento setup:­upgrade	Apply database schema and data changes
bin/ma­gento cache:­flush	Flushes cache including 3rd party modules
bin/ma­gento cache:­clean	Cleans Magento cache
bin/ma­gento indexe­r:r­eindex	Reindex Data

load(), save(), delete()	Basic CRUD operations
__cons­truct()	Constr­uctor method
getData(), setData()	Get and set model data
getRes­ource()	Retrieve model's resource model

<re­fer­enc­eCo­nta­ine­r>, <re­fer­enc­eBl­ock>	Reference existing contai­ner­s/b­locks.
<block class=­"­" templa­te=­"­">	Difine a block
<ar­gum­ent­s>	Pass arguments to blocks
<update handle­="">	Apply layout updates.

events.xml	Define observer events
execut­e(­\Mag­ent­o\F­ram­ewo­rk­\Eve­nt­\Obs­erver $observer)	Observer method.
getEvent()	getEvent()

<?php echo $block­->e­sca­peH­tml­(__­("Te­xt")); ?>	Output escaped text
<?php echo $block­->g­etU­rl(­'ro­ute­/co­ntr­oll­er/­act­ion'); ?>	Generate URL
<?php echo $block­->g­etC­hil­dHt­ml(); ?>	Output child block content