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Parser functions

মূল নিবন্ধসমূহ: parserFunctions extension এবং core parser functions

Parser functions are the WikiMedia toolkit for simple branchings, calculations, text manipulations, and the like. As a group, they take one or more parameters and return a wikitext value based on the parameters. There are two basic forms for Parser functions (distinguished by whether a pound sign follows the opening brackets):

• Core parser functions, of the form {{functionName: parameter | parameter | ... }}. These functions are part of the core wikimedia software, and should be available in all projects.
• Parser functions from the parserFunctions extension, of the form {{#functionName: parameter | parameter | ... }}. These functions are part of the parserFunctions extension, and may not be available everywhere.

Parser functions are primarily used for the evaluation of parameters or magic words, in order to produce different results in different contexts.

Core parser functions generally deal with text manipulation and WikiMedia specific tasks.

Examples of core parser functions

Description	Text Entered	Result
Uppercasing text	{{uc: Heavens to BETSY! }}	HEAVENS TO BETSY!
Lowercasing text	{{lc: Heavens to BETSY! }}	heavens to betsy!
Getting a namespace name	{{NS: 1 }}	আলাপ
Getting a wikipedia URL	{{fullurl: pagename }}	//bn.wikipedia.org/wiki/Pagename

The parserFunctions extension gives more more programming-oriented parser functions.

Examples of extension parser functions

Description	Text Entered	Result
Testing between options	{{#ifeq: yes | yes | Hooray...! | Darn...! }} {{#ifeq: yes | no | Hooray...! | Darn...! }}	Hooray...! Darn...!
Testing if a parameter is set	{{#if: {{{param|}}} | Hooray...! | Darn...! }}	Darn...!
making a calculation	{{#expr: ( 27 * 46 / pi ) round 2 }}	395.34

These functions are discussed in greater detail on their respective help pages.