Smarty Manual
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default

This is used to set a default value for a variable. If the variable is unset or an empty string, the given default value is printed instead. Default takes the one argument.

Note: With error_reporting(E_ALL), undeclared variables will always throw an error within the template. This function is useful for replacing null or zero length strings.

Parameter PositionTypeRequiredDefaultDescription
1stringNoemptyThis is the default value to output if the variable is empty.

Example 5-9. default

<?php

$smarty->assign('articleTitle', 'Dealers Will Hear Car Talk at Noon.');
$smarty->assign('email', '');

?>

Where template is: 

{$articleTitle|default:'no title'}
{$myTitle|default:'no title'}
{$email|default:'No email address available'}

Will output: 

Dealers Will Hear Car Talk at Noon.
no title
No email address available

See also the default variable handling and the blank variable handling pages.

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