Filters and functions

upper

Uppercase (UTF-8 safe)

{{ glb.name | upper }}

ACME PLUMBING

lower

Lowercase

{{ glb.name | lower }}

acme plumbing

trim

Removes spaces at both ends

{{ ' hi ' | trim }}

hi

ltrim

chars (optional)

Removes characters from the start; default is whitespace

{{ 'xxhixx' | ltrim('x') }}

hixx

rtrim

chars (optional)

Removes characters from the end

{{ 'xxhixx' | rtrim('x') }}

xxhi

slug

URL slug (sanitize_title)

{{ glb.name | slug }}

acme-plumbing

replace

search, replace

Replaces every occurrence (case sensitive)

{{ glb.name | replace('Acme', 'Zeta') }}

Zeta Plumbing

truncate

length = 100, suffix = ...

Cuts to length characters and appends the suffix only when it cut

{{ glb.name | truncate(4) }}

Acme...

reverse

Reverses a string, or a list

{{ glb.name | reverse }}

gnibmulP emcA

repeat

times = 1

Repeats the text; at most 100 times and 10,000 characters

{{ 'ab' | repeat(3) }}

ababab

split

separator = ,

Turns a string into a list

{{ glb.tags | split(',') | count }}

3

escape

esc_html: <, >, & and quotes become entities

{{ glb.html | escape }}

<b>Bold</b> & "q"

esc_attr

esc_attr, for an HTML attribute

{{ glb.html | esc_attr }}

same as above

esc_url

esc_url: a safe URL, or nothing for a bad scheme

{{ 'javascript:alert(1)' | esc_url }}

nothing

strip_tags

Removes HTML tags and script content

{{ glb.html | strip_tags }}

Bold & "q"

nl2br

Escapes, then turns line breaks into <br />

{{ glb.note | nl2br }}

a<br /> plus a newline, then b

number

decimals = 2, decimal point = ., thousands = ,

Formats a number

{{ glb.price | number(2) }}

1,234.57

European style

{{ glb.price | number(1, ',', '.') }}

1.234,6

round

precision = 0

Rounds half away from zero

{{ glb.price | round(1) }}

1234.6

ceil

Rounds up to a whole number

{{ glb.price | ceil }}

1235

floor

Rounds down

{{ glb.price | floor }}

1234

abs

Absolute value

{{ glb.price | abs }}

1234.5678

float

Converts to a decimal

{{ glb.price | float }}

1234.5678

int

Converts anything to a whole number; non-numbers become 0

{{ glb.price | int }}

1234

date

format = Y-m-d

Formats with PHP date letters

{{ glb.born | date('d/m/Y') }}

17/05/1990

date_format

format (optional)

Like date, but the default is the site's date format from Settings › General

{{ glb.born | date_format }}

May 17, 1990

age

Whole years from the date to now (365.25-day years)

{{ glb.born | age }}

36 (in October 2026)

default

fallback = empty

Uses the fallback when the value is nothing, an empty string or false. 0 and "0" are kept.

{{ glb.missing | default('N/A') }}

N/A

if_empty

fallback = empty

Uses the fallback for anything PHP calls empty: also 0, "0" and an empty list

{{ 0 | if_empty('none') }}

none

join

separator = ,

Joins a list; a non-list becomes text

{{ glb.tags | split(',') | join(' / ') }}

red / green / blue

length

Characters of a string (UTF-8) or items of a list. Anything else is 0, including a number.

{{ glb.name | length }}

13

count

Items of a list; 0 for anything else

{{ glb.tags | split | count }}

3

first

First item of a list or first character of a string

{{ glb.tags | split | first }}

red

last

Last item or last character

{{ glb.tags | split | last }}

blue

json

JSON text (Unicode and slashes unescaped)

{{ glb.tags | split | json }}

["red","green","blue"]

bool

1 for 1, true, on, yes (any case), otherwise 0

{{ 'yes' | bool }}

1

not

1 when the value is empty, otherwise 0

{{ '' | not }}

1

fn.concat

any number

The parts glued together

{{ fn.concat('a', 'b', 1) }}

ab1

fn.upper, fn.lower, fn.trim

text

Same as the filters

{{ fn.upper('abc') }}

ABC

fn.slug

text

URL slug

{{ fn.slug('Hello World!') }}

hello-world

fn.substr

text, start = 0, length (optional)

Part of a string (UTF-8). A negative start cannot be typed as a literal.

{{ fn.substr('abcdef', 1, 3) }}

bcd

fn.strpos

text, needle

Position of the first match (0 is the start); nothing when not found

{{ fn.strpos('hello', 'l') }}

2

fn.characterCount

text

Characters (UTF-8)

{{ fn.characterCount('héllo') }}

5

fn.wordCount

text

Words, after stripping HTML. Counts words made of ASCII letters only.

{{ fn.wordCount('one two three') }}

3

fn.md5

text

MD5 hash

{{ fn.md5('a') }}

0cc175b9c0f1b6a831c399e269772661

fn.implode

separator, then parts

Joins the parts

{{ fn.implode('-', 'a', 'b') }}

a-b

fn.explode

separator, text

A list

{{ fn.explode(',', 'a,b,c') }}

a, b, c

fn.json_encode

value

JSON text

{{ fn.json_encode('a') }}

"a"

fn.sum

any number

The total

{{ fn.sum(1, 2, 3.5) }}

6.5

fn.max, fn.min

any number

Largest, smallest (0 with no arguments)

{{ fn.max(1, 7, 3) }}

7

fn.round

number, precision = 0

Rounded number (precision capped at 10)

{{ fn.round(3.14159, 2) }}

3.14

fn.abs

number

Absolute value; 0 when not a number

{{ fn.abs(glb.delta) }}

fn.rand

min = 0, max = 100

A random whole number between them (inclusive)

{{ fn.rand(5, 5) }}

5

fn.count

list

Items of a list

{{ fn.count(fn.explode(',', 'a,b,c')) }}

3

fn.now

format = Y-m-d H:i:s

The current date and time

{{ fn.now('Y') }}

2026

fn.year, fn.month, fn.day

Y, m, d of today

{{ fn.month() }}

10

fn.timestamp

Unix timestamp

{{ fn.timestamp() }}

1791033965

fn.date

format = Y-m-d, timestamp (optional)

A date; today when no timestamp

{{ fn.date('Y-m-d', 0) }}

1970-01-01

fn.if

condition, then = empty, else = empty

then when the condition is truthy

{{ fn.if(src.n > 5, 'big', 'small') }}

big

fn.coalesce

any number

The first value that is not empty text and not nothing (0 counts as a value)

{{ fn.coalesce('', null, 'c') }}

c

blogname, blogdescription, siteurl, home, date_format, time_format, timezone_string, gmt_offset, start_of_week