params.md

id	title	sidebar_label
params	Parameters and interpolation	Parameters (interpolation)

⚠️ NOTE: Content of fbt:param and fbt:name will not be escaped!

Interpolation of dynamic text and other markup is accomplished in the FBT framework via <fbt:param> or fbt::param:

<fbt desc="param example">
  Hello,
  <fbt:param name="name"><?=$person->getName()?></fbt:param>.
</fbt>

fbt('Hello, ' . fbt::param('name', $person->getName()), 'param example')

These both extract to the same following text:

"Hello, {name}"

Tokens are delimited with the braces above and translations are expected to keep the same total token count and same token names for any given fbt callsite.

Required attributes

• name string: Name of the token

Optional attributes

• gender IntlVariations::GENDER_*:
  • Pass the gender of the parameter for correctly variated text.
• number number|true:
  • Passing a value of type number into the number option uses that value as the input for which we determine the CLDR plural value.
  • You can pass true to simply use the parameter value (the same value that replaces the token).

---

fbt::name

<fbt:name> is just a special form of fbt:param that requires that you pass in the gender for the interpolated variable.

<fbt desc="param example">
  Hello,
  <fbt:name name="name" gender="<?=$person->getGender()?>"><?=$person->getName()?></fbt:name>.
</fbt>

Here, gender must be one of the 3 supported gender values in IntlVariations:

IntlVariations::GENDER_MALE:    1;
IntlVariations::GENDER_FEMALE:  2;
IntlVariations::GENDER_UNKNOWN: 3;

---

Duplicate tokens

Tokens with the same name, but different values are prohibited in FBT. If you want the same interpolation to show up, you must use fbt:same-param or fbt::sameParam. This construct only takes a name and no value, as the value to the first instance is re-used for the second token.

<fbt desc="param example">
  <fbt:name name="name" gender="<?=$gender?>">
    <a href="#"><?=$name?></a>
  </fbt:name>
  shared a link.  Tell
  <fbt:same-param name="name" />
  you liked it.
</fbt>

fbt(
  fbt::name(
    'name',
     '<a href="#">' . $name . '</a>',
     $gender
   ) .
  ' shared a link.  Tell ' . fbt::sameParam('name') . ' you liked it.',
  'param example'
)