Detailed explanation of if, elseif, else usage in php Smarty-PHP Tutorial-php.cn

php Smarty template conditional selection structure if-elseif-else, {if} must appear in pairs with {/if}, of course, {else} and {elseif} clauses can also be used, { The following modifiers can be used in if}:

if instance

{if} instance:

{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}

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if elseif instance:

{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}

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example

 {foreach from=$users item=row}  {foreach from=$row item=col key=k} {* 注意if语句与小括号(不是必须的)之间的空格，有严格的要求 *}  {/foreach}  {foreachelse}  {/foreach} {$k}:{$col}
没有数据啊

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The program assigns the value of $usersvariableto the followingarray:

array( array('name' => 'wjj','age' => '保密'), array('name' => 'qxy','age' => '好像比我小') )

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