capture

{capture} is used to collect the output of the template between the tags into a variable instead of displaying it. Any content between {capture name='foo'} and {/capture} is collected into the variable specified in the name attribute.

The captured content can be used in the template from the variable $smarty.capture.foo where 'foo' is the value passed in the name attribute. If you do not supply the name attribute, then 'default' will be used as the name ie $smarty.capture.default.

{capture}'s can be nested.

Attribute	Required	Default	Description
name	Yes	n/a	The name of the captured block
assign	No	n/a	The variable name where to assign the captured output to
append	No	n/a	The name of an array variable where to append the captured output to

{capture name='testCapture1'}
this will be captured
{for $i=1 to 10}
    {$i}
{/for}
{/capture}

[{$smarty.capture.testCapture1}]

Output:

[this will be captured
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
]

see also {capture} in PHP Smarty documentation