Block Functions
void smarty_block_name (array $params, mixed $content, object &$smarty, boolean &$repeat)
Block functions are functions of the form: {func} .. {/func}. In other
words, they enclose a template block and operate on the contents of
this block. Block functions take precedence over custom functions of
the same name, that is, you cannot have both custom function {func} and
block function {func} .. {/func}.
By default your function implementation is called twice by
Smarty: once for the opening tag, and once for the closing tag
(see &$repeat below how to change this).
Only the opening tag of the block function may have attributes. All
attributes passed to template functions from the template are contained
in the $params as an associative array. You can
access those values as e.g. $params['start'].
The opening tag attributes are also accessible to your function
when processing the closing tag.
The value of $content variable depends on
whether your function is called for the opening or closing tag. In case
of the opening tag, it will be null, and in case of
the closing tag it will be the contents of the template block.
Note that the template block will have already been processed by
Smarty, so all you will receive is the template output, not the
template source.
The parameter &$repeat is passed by
reference to the function implementation and provides a
possibility for it to control how many times the block is
displayed. By default $repeat is
true at the first call of the block-function
(the block opening tag) and false on all
subsequent calls to the block function (the block's closing tag).
Each time the function implementation returns with
&$repeat being true, the contents between
{func} .. {/func} are evaluated and the function implementation
is called again with the new block contents in the parameter
$content.
If you have nested block functions, it's possible to find out what the
parent block function is by accessing
$smarty->_tag_stack variable. Just do a var_dump()
on it and the structure should be apparent.
See also:
register_block(),
unregister_block().
Example 16-5. block function
<?php
/*
* Smarty plugin
* -------------------------------------------------------------
* File: block.translate.php
* Type: block
* Name: translate
* Purpose: translate a block of text
* -------------------------------------------------------------
*/
function smarty_block_translate($params, $content, &$smarty, &$repeat)
{
if (isset($content)) {
$lang = $params['lang'];
// do some intelligent translation thing here with $content
return $translation;
}
}
?>
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