Smarty Manual
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strip_tags

This strips out markup tags, basically anything between < and >.

Parameter PositionTypeRequiredDefaultDescription
1boolNoTRUEThis determines whether the tags are replaced by ' ' or ''

Example 5-20. strip_tags

<?php

$smarty->assign('articleTitle',
                "Blind Woman Gets <font face=\"helvetica\">New
Kidney</font> from Dad she Hasn't Seen in <b>years</b>."
               );

?>

Where template is: 

{$articleTitle}
{$articleTitle|strip_tags} {* same as {$articleTitle|strip_tags:true} *}
{$articleTitle|strip_tags:false}

Will output: 

Blind Woman Gets <font face="helvetica">New Kidney</font> from Dad she Hasn't Seen in <b>years</b>.
Blind Woman Gets  New Kidney  from Dad she Hasn't Seen in  years .
Blind Woman Gets New Kidney from Dad she Hasn't Seen in years.

See also replace and regex_replace.

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