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{if} statements in Smarty have much the same flexibility as PHP
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 $security is enabled,
only PHP functions from the IF_FUNCS array from $security_settings
are allowed.
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 |
Example 7.15. {if} statements
{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 $var is even by 3}
...
{/if}
Example 7.16. {if} with more examples
{if isset($name) && $name == 'Blog'}
{* do something *}
{elseif $name == $foo}
{* do something *}
{/if}
{if is_array($foo) && count($foo) > 0}
{* do a foreach loop *}
{/if}
{if $name=='John'} {* doesnot work, spaces are missing. *} this will never be seen {/if} {if $name == 'John'} {* works just fine *} Hello John {/if}