eq相等   ne、neq不相等，   gt大於， lt小於 gte、ge大於等於   lte、le 小於等於   not非   mod求模   is [not] div by是否能被某數整除   is [not] even是否為偶數   is [not] even by $b即($a / $b) % 2 == 0   is [not] odd是否為奇   is not odd by $b即($a / $b) % 2 != 0 示例：

equal/ not equal/ greater than/ less than/ less than or equal/ great than or equal/後面的就不用說了

Smarty 中的 if 語句和 php 中的 if 語句一樣靈活易用，並增加了幾個特性以適宜模板引擎. if 必須於 /if 成對出現. 可以使用 else 和 elseif 子句. 可以使用以下條件修飾詞：eq、ne、neq、gt、lt、lte、le、gte、ge、is even、is odd、is not even、is not odd、not、mod、div by、even by、odd by、==、!=、>、<、<=、>=. 使用這些修飾詞時必須和變數或常量用空格格開.

Example 7-11. if statements

例 7-11. if 語句演示

{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}

{* the following syntax will NOT work, conditional qualifiers

must be separated from surrounding elements by spaces *}

{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}

{* 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}