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{if},{elseif},{else} {#language.function.if}
====================
`{if}` statements in Smarty have much the same flexibility as PHP
[if](&url.php-manual;if) statements, with a few added features for the
template engine. Every `{if}` must be paired with a matching `{/if}`.
`{else}` and `{elseif}` are also permitted. All PHP conditionals and
functions are recognized, such as *\|\|*, *or*, *&&*, *and*,
*is\_array()*, etc.
If securty is enabled, only PHP functions from `$php_functions` property
of the securty policy are allowed. See the
[Security](#advanced.features.security) section for details.
The following is a list of recognized qualifiers, which must be
separated from surrounding elements by spaces. Note that items listed in
\[brackets\] are optional. PHP equivalents are shown where applicable.
Qualifier Alternates Syntax Example Meaning PHP Equivalent
-------------------- ------------ ------------------------ -------------------------------- ----------------------
== eq \$a eq \$b equals ==
!= ne, neq \$a neq \$b not equals !=
\> gt \$a gt \$b greater than \>
\< lt \$a lt \$b less than \<
\>= gte, ge \$a ge \$b greater than or equal \>=
\<= lte, le \$a le \$b less than or equal \<=
=== \$a === 0 check for identity ===
! not not \$a negation (unary) !
\% mod \$a mod \$b modulous \%
is \[not\] div by \$a is not div by 4 divisible by \$a % \$b == 0
is \[not\] even \$a is not even \[not\] an even number (unary) \$a % 2 == 0
is \[not\] even by \$a is not even by \$b grouping level \[not\] even (\$a / \$b) % 2 == 0
is \[not\] odd \$a is not odd \[not\] an odd number (unary) \$a % 2 != 0
is \[not\] odd by \$a is not odd by \$b \[not\] an odd grouping (\$a / \$b) % 2 != 0
{if $name eq 'Fred'}
Welcome Sir.
{elseif $name eq 'Wilma'}
Welcome Ma'am.
{else}
Welcome, whatever you are.
{/if}
{* an example with "or" logic *}
{if $name eq 'Fred' or $name eq 'Wilma'}
...
{/if}
{* same as above *}
{if $name == 'Fred' || $name == 'Wilma'}
...
{/if}
{* parenthesis are allowed *}
{if ( $amount < 0 or $amount > 1000 ) and $volume >= #minVolAmt#}
...
{/if}
{* you can also embed php function calls *}
{if count($var) gt 0}
...
{/if}
{* check for array. *}
{if is_array($foo) }
.....
{/if}
{* check for not null. *}
{if isset($foo) }
.....
{/if}
{* test if values are even or odd *}
{if $var is even}
...
{/if}
{if $var is odd}
...
{/if}
{if $var is not odd}
...
{/if}
{* test if var is divisible by 4 *}
{if $var is div by 4}
...
{/if}
{*
test if var is even, grouped by two. i.e.,
0=even, 1=even, 2=odd, 3=odd, 4=even, 5=even, etc.
*}
{if $var is even by 2}
...
{/if}
{* 0=even, 1=even, 2=even, 3=odd, 4=odd, 5=odd, etc. *}
{if $var is even by 3}
...
{/if}
{if isset($name) && $name == 'Blog'}
{* do something *}
{elseif $name == $foo}
{* do something *}
{/if}
{if is_array($foo) && count($foo) > 0}
{* do a foreach loop *}
{/if}
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