How to Use Parser Functions in MediaWiki

Step-by-Step Guide

1. 1

   Step 1: The parser function if displays results depending on whether what you put for y is blank

   While you can put anything instead of a parameter, it won't have much use.
   
   Replace y with what parameter you want to check.
   
   Replace z with what you want to appear if y is supplied.
   
   Replace a with what you want to appear if y isn't supplied.
2. 2

   Step 2: or contains character(s).

   As with #if:, this parser function is most helpful when used with parameters rather than plain text.
   
   Replace y and z with what strings/parameters you want to compare.
   
   Replace a with what you want to appear if y and z are the same.
   
   Replace b with what you want to appear if y and z aren't the same. , {{ #switch: y | a=b | c=d | e=f }} Replace a, c, e, etc. with what result you want to appear if what you supply for y.
   
   Replace b, d, f, etc. with what you want to appear if y happens to equal a, c, e, and so on. , This parser function can be pretty handy with parameters and magic words at times. {{ #expr: y }} Replace y with the math problem you want to solve.
3. 3

   Step 3: ifeq displays results depending on whether or not y and z are the same things.

4. 4

   Step 4: switch is basically a more extended and versatile version of the parser function #ifeq.

5. 5

   Step 5: expr basically does math expressions.

Detailed Guide

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