词 | 义 | 说明 |
---|---|---|
eq | 等于 | equal |
ne,neq | 不等于 | not equal |
gt | 大于 | greater than |
lt | 小于 | less than |
get,ge | 大于等于 | great than or equal |
lte,le | 小于等于 | less than or equal |
not | 非 | |
mod | 取余 | |
is not div | 是否能被整除 | $a is not div by $b即$a%$b==0 |
is not even | 是否是偶数 | $a is not even by $b即($a/$b)%2==0 |
is not odd | 是否是奇数 | $a is not odd by $b即($a / $b) % 2 != 0 |
Smarty 中的 if 语句和 php 中的 if 语句一样灵活易用,并增加了几个特性以适宜模板引擎,{if} 必须与 {/if} 成对出现,可以使用 else 和 elseif 子句, 可以使用以下条件修饰词:
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、==、!=、>、<、<=、>=。
使用这些修饰词时必须和变量或常量用空格格开。
例. if 语句演示
{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}
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原文出处:Yiiven https://cloud.tencent.com/developer/article/2193076