All page names need to be in English.
en da  de  fr  it  ja  km  nl  ru  zh

TypoScript Constants

From TYPO3Wiki
Jump to navigation Jump to search

This page belongs to the Core Team (category Core Team)

notice - Reviewer needed

Change the {{review}} marker to {{publish}} when all parts are reviewed (e.g. TypoScript). info

This page is a draft designed to be included in the Core manual: TypoScript Syntax and In-depth Study

To insert at the end of Chapter 1.2. Syntax, before "Includes"


Declaring and using constants

TypoScript constants are declared in the "Constants" field of a TypoScript template. Example:

styles.content.imgtext.maxW = 600

To use that constant in a TypoScript template, use the following syntax:

temp.myimage.width = {$styles.content.imgtext.maxW}

Since constant declarations are TypoScript, you can use comments, operators and conditions.

Preparing for the constant editor

The Web > Template module contains the Constant Editor. With this editor it is possible to modify TypoScript constants in a user-friendly way. But only properly declared constants will readily appear in the Constant Editor. Here is an example:

#cat=content,basic/cImage/a_maxw1; type=int+; label= Max Image Width: Maximum width in pixels a block of images inserted as content is allowed to consume.
styles.content.imgtext.maxW = 600

Let's check this syntax in depth: "cat" is the category of the constant definition. Several categories may be assigned though one is the standard. The category can consist of category, subcategory and a sorting
"type" is the type of the constant and defines of what nature the input file will be
"label" is a description label for the constant

Constant Types
Constant editor.png


# cat=basic/xxx/010; type=string; label= string: my String
t1 = I am a string

# cat=basic/xxx/011; type=int; label= int: (Integer, may be negative)
t2 = -99

# cat=basic/xxx/012; type=int+; label= int+: (Integer, only positive)
t3 = 88

# cat=basic/xxx/013; type=offset; label= offset: (x and y values)
t4 = 88, 55

# cat=basic/xxx/010; type=color; label= color: a color picker
t5 = ff0000

# cat=basic/xxx/011; type=wrap; label= wrap: a Wrap
t51 = <b>|</b>

# cat=basic/xxx/011; type=options[de,en,fr,zh]; label= options[de, en, fr, zh] a drop down option field
t7 = de

# cat=basic/xxx/010; type=boolean; label= enable: a checkbox
t8 = 1

# cat=basic/xxx/010; type=small; label= small a short input field
t9 = xyz

Additionally a user defined field exists: "user" and a "comment" field for non-editable values exist.

Constant categories

The constants main category defines the page in the constant editor on which the constant will appear The following constant categories are predefined:

  • 'basic': Important constants for the template layout. For example: dimensions, image files and feature flags. You almost always want to configure these constants.
  • 'menu': Menu setup. This includes font files, sizes, background images. Depends on the menu type.
  • 'content': All constants related to the display of page content elements
  • 'page': General configuration like meta-tags, link targets, etc.
  • 'advanced': Configures advanced, rarely used functions.
  • 'all': A list of all constants.

Custom main categories can be defined for extensions. Example:

# cat=plugin.tx_lot3blog/color/210; type=color; label=Tagcloud Minimum Color

The subcategories define the section in which the constant should appear. The following standard subcategories exist:

  • 'enable': Enable features
  • 'dims': Dimensions: widths, heights, pixels
  • 'file': Files
  • 'typo': Typography
  • 'color': Colors
  • 'links': Links and targets
  • 'language': Language specific constants

Furthermore the following content-element-specific subcategories exist:

cheader, cheader_g, ctext, cimage, cbullets, ctable, cuploads, cmultimedia, cmailform, csearch, clogin, csplash, cmenu, cshortcut, clist, cscript, chtml

You can add your own subcategories by defining them the following way:

## Define custom categories
# customsubcategory=your_subcat_name=LLL:EXT:your_extension/locallang.xlf:subcat_name

## Use your new subcategory
plugin.your_extension {

	# cat=plugin.your_extension_mainconfig/subcat_name/0010; type=int+; label= Set your PID
	PID =

Source: (German) TYPO3 Konstanten im Konstanteneditor anzeigen