Help:Extension:ParserFunctions/sv

Programtillägget ParserFunctions ger tio extra parserfunktioner som kompleterar de magiska orden som följer med MediaWiki. Grundsyntaxen på alla perserfunktionerna på den här sidan ser ut som följer:

{{#funktionens-namn:argument 1|argument 2|argument 3 ...}}

#expr:

Typ	Operator
Gruppering (parenteser)	( )
Tal	1234.5 2.4E5 e (2.718) pi (3.142)
Logisk	or
	and
	= != <> > < <= >=
Avrundande	round
Binär	+ - mod
	* / div
	^
Unär	not ceil trunc floor abs ln sin cos tan acos asin atan
	e + -

#expr: beräknar mattematiska uttryck och svarar med lösningen på uträkningen.

{{#expr: uttryck }}

Alla tillgängliga operatorer finns i tabellen till höger. Se Help:Calculation för mer detaljerad information om varje operator. Noggrannheten och formatet på resultatet beror på operativsystemet och språkinställningarna i MediaWiki-installationen.

När man använder boolesk algebra, ersätts noll med false och alla nollskilda värden, positiva och negativa, ersätts med true.

{{#expr: 1 and -1 }} → 1

{{#expr: 1 and 0 }} → 0

Ett tomt input-uttryck returnerar en tom sträng. Ogiltiga uttryck returnerar en av följande felmeddelanden, som kan fångas med #iferror:-funktionen:

{{#expr: }} →

{{#expr: 1+ }} →

{{#expr: 1 foo 2 }} →

Varning:

Några uttryck kan ge flyttals-fel när de används med väldigt stora eller vädligt små tal: {{#expr: 20060618093259 mod 10000}} → 3259 i de flesta fall, men ger ibland -6357. Detta varierar med specifikationerna och konfigurationen för servern där wikin körs. Se bug 6356.

#if:

{{#if: teststräng | svar om sant | svar om falskt }}

Den här funktionen testar om en sträng är tom eller inte. Den svarar med false om strängen är tom eller bara innehåller mellanslag och radbrytningar.

{{#if: | ja | nej}} → nej

{{#if: sträng | ja | nej}} → ja

{{#if:      | ja | nej}} → nej

{{#if:

| ja | nej}} → no

Teststrängen är alltid tolkad som text och beräknar eller jämför inte matematiska uttryck:

{{#if: 1==2 | ja | nej}} → ja

Båda svarsvärdena kan utelämnas:

{{#if: foo | ja }} → ja

{{#if: | ja }} →

{{#if: foo | | nej}} →

Se Help:Parser functions in templates för fler exempel på den här parserfunktionen.

#ifeq:

Den här parserfunktionen jämför två värden och ser om de är identiska.

{{#ifeq: sträng 1 | sträng 2 | värde om sant | värde om falskt }}

Om båda värdena är tal så jämförs värdena av talen:

{{#ifeq: 01 | 1 | ja | nej}} → ja

{{#ifeq: 0 | -0 | ja | nej}} → ja

Annars så görs jämförelsen med textinnehållet i strängen (jämförelsen är teckenkänslig):

{{#ifeq: foo | bar | ja | nej}} → nej

{{#ifeq: foo | Foo | ja | nej}} → nej

{{#ifeq: "01" | "1" | ja | nej}} → nej

Varning:

Text inom <nowiki>-taggar som används i parserfunktioner resulterar i felaktigheter: {{#ifeq: <nowiki>foo</nowiki> | <nowiki>foo</nowiki> | ja | nej}} → nej

#iferror:

This function takes an input string and returns one of two results; the function evaluates to true if the input string contains an HTML object with class="error", as generated by other parser functions such as #expr:, #time: and #rel2abs:, template errors such as loops and recursions, and other 'failsoft' parser errors.

{{#iferror: test string | value if error | value if correct }}

One or both of the return strings can be omitted. If the correct string is omitted, the test string is returned if it is not erroneous. If the error string is also omitted, an empty string is returned on an error:

{{#iferror: {{#expr: 1 + 2 }} | error | correct }} → correct

{{#iferror: {{#expr: 1 + X }} | error | correct }} → error

{{#iferror: {{#expr: 1 + 2 }} | error }} → 3

{{#iferror: {{#expr: 1 + X }} | error }} → error

{{#iferror: {{#expr: 1 + 2 }} }} → 3

{{#iferror: {{#expr: 1 + X }} }} →

#ifexpr:

This function evaluates a mathematical expression and returns one of two strings depending on the boolean value of the result:

{{#ifexpr: expression | value if true | value if false }}

The expression input is evaluated exactly as for #expr: above, with the same operators being available. The output is then evaluated as a boolean expression. This function is equivalent to one using #ifeq: and #expr: only:

{{#ifeq: {{#expr: expression }} | 0 | value if false | value if true }}

An empty input expression evaluates to false:

{{#ifexpr: | yes | no}} → no

Either or both the return values may be omitted; no output is given when the appropriate branch is left empty:

{{#ifexpr: 1 > 0 | yes }} → yes

{{#ifexpr: 1 < 0 | yes }} →

{{#ifexpr: 1 > 0 | | no}} →

{{#ifexpr: 1 > 0 }} →

#ifexist:

This function takes an input string, interprets it as a page title, and returns one of two values depending on whether or not the page exists on the local wiki.

{{#ifexist: page title | value if exists | value if doesn't exist }}

The function evaluates to true if the page exists, whether it contains content, is visibly blank (contains meta-data such as category links or magic words, but no visible content), is blank, or is a redirect. Only pages that are redlinked evaluate to false, including if the page used to exist but has been deleted.

{{#ifexist: Help:Extension:ParserFunctions/sv | exists | doesn't exist }} → exists

{{#ifexist: XXXHelp:Extension:ParserFunctions/svXXX | exists | doesn't exist }} → doesn't exist

The function evaluates to true for system messages that have been customised, and for special pages that are defined by the software.

{{#ifexist: Special:Watchlist | exists | doesn't exist }} → exists

{{#ifexist: Special:CheckUser | exists | doesn't exist }} → exists (because the CheckUser extension is installed on this wiki)

{{#ifexist: MediaWiki:Copyright | exists | doesn't exist }} → exists (because MediaWiki:Copyright has been customised)

#ifexist: is considered an "expensive parser function", only a limited number of which can be included on any one page (including functions inside transcluded templates). When this limit is exceeded, the page is categorised into Category:Pages with too many expensive parser function calls, and any further #ifexist: functions automatically return false, whether the target page exists or not.

If a page checks a target using #ifexist:, then that page will appear in the Special:WhatLinksHere list for the target page. So if the code {{#ifexist:Foo}} were included live on this page (Help:Extension:ParserFunctions/sv), Special:WhatLinksHere/Foo will list Help:Extension:ParserFunctions/sv.

On wikis using a shared media repository, #ifexist: can be used to check if a file has been uploaded to the repository, but not to the wiki itself:

{{#ifexist: File:Example.png | exists | doesn't exist }} → doesn't exist

{{#ifexist: Image:Example.png | exists | doesn't exist }} → doesn't exist

{{#ifexist: Media:Example.png | exists | doesn't exist }} → exists

If a local description page has been created for the file, the result is exists for all of the above.

#rel2abs:

This function converts a relative file path into an absolute filepath.

{{#rel2abs: path }}

{{#rel2abs: path | base path }}

Within the path input, the following syntax is valid:

• . → the current level
• .. → "go up one level"
• /foo → "go down one level into the subdirectory /foo"

If the base path is not specified, the full page name of the page will be used instead:

{{#rel2abs: /quok | Help:Foo/bar/baz }} → Help:Foo/bar/baz/quok

{{#rel2abs: ./quok | Help:Foo/bar/baz }} → Help:Foo/bar/baz/quok

{{#rel2abs: ../quok | Help:Foo/bar/baz }} → Help:Foo/bar/quok

{{#rel2abs: ../. | Help:Foo/bar/baz }} → Help:Foo/bar

Invalid syntax, such as /. or /./, is ignored. Since no more than two consecutive full stops are permitted, sequences such as these can be used to separate successive statements:

{{#rel2abs: ../quok/. | Help:Foo/bar/baz }} → Help:Foo/bar/quok

{{#rel2abs: ../../quok | Help:Foo/bar/baz }} → Help:Foo/quok

{{#rel2abs: ../../../quok | Help:Foo/bar/baz }} → quok

{{#rel2abs: ../../../../quok | Help:Foo/bar/baz }} →

#switch:

This function compares one input value against several test cases, returning an associated string if a match is found.

{{#switch: comparison string
 | case = result
 | case = result
 | ...
 | case = result
 | default result
}}

The default result is returned if no case string matches the comparison string. In this syntax, the default result must be the last parameter and must not contain a raw equals sign. Alternatively, the default result may be explicitly declared with a case string of "#default"; default results declared in this way may be placed anywhere within the function:

{{#switch: test | foo = Foo | #default = Bar | baz = Baz }} → Bar

If no match is made, no content is added. It is possible to have 'fall through' values, where several case strings return the same result string. This minimises duplication.

{{#switch: comparison string
 | case1 = result1
 | case2 
 | case3 
 | case4 = result2
 | case5 = result3
 | case6 
 | case7 = result4
 | default result
}}

Here cases 2, 3 and 4 all return result2; cases 6 and 7 both return result4

As with #ifeq:, the comparison is made numerically if both the comparison string and the case string being tested are numeric; or as case-sensitive string otherwise. A case string may be empty:

{{#switch: | = Nothing | foo = Foo | Something }} → Nothing

Once a match is found, subsequent cases are ignored:

{{#switch: b | f = Foo | b = Bar | b = Baz | }} → Bar

Warning:

"Case" strings cannot contain raw equals signs; instead, create a template at {{=}} with =: {{#switch: 1=2 | 1=2 = raw | 1<nowiki>=</nowiki>2 = nowiki | 1&#61;2 = html | 1{{=}}2 = template | foo }} → template

#time:

Code	Description	Current output
Year
Y	4-digit year.	2013
y	2-digit year.	13
L	1 or 0 whether it's a leap year or not	0
o ¹	ISO-8601 year number. ²	2013 ³
¹ Requires PHP 5.1.0 and newer and rev:45208 ² This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. ³ Will output literal o if ¹ not fulfilled
Month
n	Month index, not zero-padded.	5
m	Month index, zero-padded.	05
M	An abbreviation of the month name, in the site language.	May
F	The full month name in the site language.	May
Week
W	ISO 8601 week number, zero-padded.	21
Day
j	Day of the month, not zero-padded.	20
d	Day of the month, zero-padded.	20
z	Day of the year (January 1 = 0)	139
D	An abbreviation for the day of the week. Rarely internationalised.	Mon
l	The full weekday name. Rarely internationalised.	Monday
N	ISO 8601 day of the week.	1
w	number of the day of the week (Monday = 1).	1
Hour
a	"am" during the morning (00:00:00 → 11:59:59), "pm" otherwise (12:00:00 → 23:59:59)	pm
A	Uppercase version of a above.	PM
g	Hour in 12-hour format, not zero-padded.	5
h	Hour in 12-hour format, zero-padded.	05
G	Hour in 24-hour format, not zero-padded.	17
H	Hour in 24-hour format, zero-padded.	17
Minutes and seconds
i	Minutes past the hour, zero-padded.	43
s	Seconds past the minute, zero-padded.	55
U	Seconds since January 1 1970 00:00:00 GMT.	1369071835
Miscellaneous
L	1 if this year is a leap year in the Gregorian calendar, 0 otherwise	0
t	Number of days in the current month.	31
c	ISO 8601 formatted date, equivalent to Y-m-dTH:i:s+00:00.	2013-05-20T17:43:55+00:00
r	RFC 2822 formatted date, equivalent to D, j M Y H:i:s +0000, with weekday name and month name not internationalised.	Mon, 20 May 2013 17:43:55 +0000
Non-Gregorian calendars
Iranian
xij	Day of the month	30
xiF	Full month name	Ordibehesht
xin	Month index	2
xiY	Full year	1392
Hebrew
xjj	Day of the month	11
xjF	Full month name	Sivan
xjx	Genitive form of the month name	Sivan
xjn	Month number	9
xjY	Full year	5773
Thai solar
xkY	Full year	2556
Flags
xn	Format the next numeric code as a raw ASCII number.	In the Hindi language, {{#time:H, xnH}} produces ०६, 06
xN	Like xn, but as a toggled flag, which endures until the end of the string or until the next appearance of xN in the string.
xr	Format the next number as a roman numeral. Only works for numbers up to 3000.	{{#time:xrY}} → MMXIII
xg	Before a month flag (n, m, M, F), output the genitive form if the site language distinguishes between genitive and nominative forms.

This parser function takes a date and/or time construct and formats it according to the syntax given. A date/time object can be specified; the default is the value of the magic word {{CURRENTTIMESTAMP}} – that is, the time the page was last rendered into HTML.

{{#time: format string }}

{{#time: format string | date/time object }}

The list of accepted formatting codes is given in the table to the right. Any character in the formatting string that is not recognised is passed through unaltered. There are also two ways to escape characters within the formatting string:

1. A backslash followed by a formatting character is interpreted as a single literal character
2. characters enclosed in double quotes are considered literal characters, and the quotes are removed

In addition, the digraph xx is interpreted as a single literal "x".

{{#time: Y-m-d }} → 2013-05-20

{{#time: [[Y]] m d }} → 2013 05 20

{{#time: [[Y (year)]] }} → 2013 (13UTCpmMon, 20 May 2013 17:43:55 +0000)

{{#time: [[Y "(year)"]] }} → 2013 (year)

{{#time: i's" }} → 43'55"

The date/time object can be in any format accepted by PHP's strtotime() function. Both absolute (eg 20 December 2000) and relative (eg +20 hours) times are accepted.

Warning:

The range of acceptable input is January 1 0100 → December 31 9999. Values outside this range will be misinterpreted: {{#time: d F Y | 15 April 0099 }} → 15 April 0099 {{#time: d F Y | 15 April 10000 }} →

Full or partial absolute dates can be specified; the function will 'fill in' parts of the date that are not specified using the current values:

{{#time: Y | January 1 }} → 2013

A four-digit number is interpreted as hours and minutes if possible, and otherwise as year:

{{#time: Y m d H:i:s | 1959 }} → 1959 05 20 00:00:00 Input is treated as a time rather than a year.

{{#time: Y m d H:i:s | 1960 }} → 1960 05 20 00:00:00 Since 19:60 is no valid time, 1960 is treated as a year.

A six-digit number is interpreted as hours, minutes and seconds if possible, but otherwise as an error (not, for instance, a year and month):

{{#time: Y m d H:i:s | 195909 }} → 2013 05 20 19:59:09 Input is treated as a time rather than a year+month code.

{{#time: Y m d H:i:s | 196009 }} → Although 19:60:09 is no valid time, 196009 is not interpreted as September 1960.

Warning:

The fill-in feature is not consistent; some parts are filled in using the current values, others are not: {{#time: Y m d H:i:s | January 1 }} → 2013 01 01 00:00:00 {{#time: Y m d H:i:s | February 2007 }} → 2007 02 01 00:00:00 Goes to the start of the month, not the current day.

The function performs a certain amount of date mathematics:

{{#time: d F Y | January 0 2008 }} → 31 December 2007

{{#time: d F | January 32 }} →

{{#time: d F | February 29 2008 }} → 29 February

{{#time: d F | February 29 2007 }} → 01 March

#timel:

This function is identical to {{#time: ... }}, except that it uses the local time of the wiki (as set in $wgLocaltimezone) when no date is given.

{{#time: Y-m-d }} → 2013-05-20

{{#timel: Y-m-d }} → 2013-05-20

{{#time: Y F d h:i:s}} → 2013 May 20 05:43:55

{{#timel: Y F d h:i:s}} → 2013 May 20 05:43:55

#titleparts:

This function separates a pagetitle into segments based on slashes, then returns some of those segments as output.

{{#titleparts: pagename | number of segments to return | first segment to return }}

If the number of segments parameter is not specified, it defaults to "0", which returns all the segments. If the first segment parameter is not specified or is "0", it defaults to "1":

{{#titleparts: Talk:Foo/bar/baz/quok }} → Talk:Foo/bar/baz/quok

{{#titleparts: Talk:Foo/bar/baz/quok | 1 }} → Talk:Foo

{{#titleparts: Talk:Foo/bar/baz/quok | 2 }} → Talk:Foo/bar

{{#titleparts: Talk:Foo/bar/baz/quok | 2 | 2 }} → bar/baz

Negative values are accepted for both values. Negative values for number of segments effectively 'strips' segments from the end of the string. Negative values for first segment translates to "add this value to the total number of segments", loosely equivalent to "count from the right":

{{#titleparts: Talk:Foo/bar/baz/quok | -1 }} → Talk:Foo/bar/baz

{{#titleparts: Talk:Foo/bar/baz/quok | | -1 }} → quok

{{#titleparts: Talk:Foo/bar/baz/quok | -1 | 2 }} → bar/baz Strips one segment from the end of the string, then returns the second segment and beyond

The string is split a maximum of 25 times; further slashes are ignored. The string is also limited to 255 characters, as it is treated as a page title:

{{#titleparts: a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/aa/bb/cc/dd/ee | 1 | 25 }} → y/z/aa/bb/cc/dd/ee

General points

Substitution

Parser functions can be substituted by prefixing the hash character with subst::

{{subst:#ifexist: Help:Extension:ParserFunctions/sv | [[Help:Extension:ParserFunctions/sv]] | Help:Extension:ParserFunctions/sv }} → the code [[Help:Extension:ParserFunctions/sv]] will be inserted in the wikitext since the page Help:Extension:ParserFunctions/sv exists.

Warning:

The results of substituted parser functions are undefined if the expressions contain unsubstituted volatile code such as variables or other parser functions. For consistent results, all the volatile code in the expression to be evaluated must be substituted. See Help:Substitution.

Tabeller

Perserfunktioner förstör wikitabell-syntax genom att den behandlar lodrätt streck (|) som en paremtersavgränsare. För att undvika detta så skapar många wikis mallen Template:! innehållande bara ett lodrätt streck. Detta 'döljer' strecket från preserfunktionen. Alternativt så kan man använda en vanlig HTML-tabell.

Stripping whitespace

Whitespace, including newlines, tabs, and spaces, is stripped from the beginning and end of all the parameters of these parser functions. If this is not desirable, adding any non-whitespace characters (including the HTML encoding for a whitespace character, invisible Unicode characters such as the zero-width space or direction marks, or sequences recognised and stripped by the MediaWiki parser such as <nowiki/>) will prevent further stripping:

{{#ifeq: foo            |            foo | equal | not equal }}

→ equal

{{#ifeq:  foo             |             foo  | equal | not equal }}

→ not equal

{{#ifeq: <nowiki/>foo           <nowiki/> | <nowiki/>           foo<nowiki/> | equal | not equal }}

→ not equal

See also

• Help:Parser functions in templates
• Help:Newlines and spaces
• Help:Magic words