php Smarty 字符比较代码

eq相等， 
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是否能被某数整除， 
is [not] even是否为偶数， 
$a is [not] even by $b即($a / $b) % 2 == 0， 
is [not] odd是否为奇， 
$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/后面的就不用说了 
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 必须于 /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. 

Example 7-11. if statements 
例 7-11. 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}