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ne、neq不相等，
gt大于，
lt小于，
gte、ge大于等于，
lte、le 小于等于，
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，
$a is [not] even by $b即($a / $b) % 2 == 0，
is [not] odd是否為奇，
$a 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/后面的就不用說了
Smarty 中的 if 語句和 php 中的 if 語句一樣靈活易用，并增加了幾個特性以適宜模板引擎. if 必須于 /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量或常量用空格格開.
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}
php技術：php Smarty 字符比較代碼，轉載需保留來源！
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