122 lines
3.9 KiB
Markdown
122 lines
3.9 KiB
Markdown
{if},{elseif},{else} {#language.function.if}
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====================
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`{if}` statements in Smarty have much the same flexibility as PHP
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[if](&url.php-manual;if) statements, with a few added features for the
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template engine. Every `{if}` must be paired with a matching `{/if}`.
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`{else}` and `{elseif}` are also permitted. All PHP conditionals and
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functions are recognized, such as *\|\|*, *or*, *&&*, *and*,
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*is\_array()*, etc.
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If securty is enabled, only PHP functions from `$php_functions` property
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of the securty policy are allowed. See the
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[Security](#advanced.features.security) section for details.
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The following is a list of recognized qualifiers, which must be
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separated from surrounding elements by spaces. Note that items listed in
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\[brackets\] are optional. PHP equivalents are shown where applicable.
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Qualifier Alternates Syntax Example Meaning PHP Equivalent
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-------------------- ------------ ------------------------ -------------------------------- ----------------------
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== eq \$a eq \$b equals ==
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!= ne, neq \$a neq \$b not equals !=
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\> gt \$a gt \$b greater than \>
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\< lt \$a lt \$b less than \<
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\>= gte, ge \$a ge \$b greater than or equal \>=
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\<= lte, le \$a le \$b less than or equal \<=
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=== \$a === 0 check for identity ===
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! not not \$a negation (unary) !
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\% mod \$a mod \$b modulous \%
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is \[not\] div by \$a is not div by 4 divisible by \$a % \$b == 0
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is \[not\] even \$a is not even \[not\] an even number (unary) \$a % 2 == 0
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is \[not\] even by \$a is not even by \$b grouping level \[not\] even (\$a / \$b) % 2 == 0
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is \[not\] odd \$a is not odd \[not\] an odd number (unary) \$a % 2 != 0
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is \[not\] odd by \$a is not odd by \$b \[not\] an odd grouping (\$a / \$b) % 2 != 0
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{if $name eq 'Fred'}
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Welcome Sir.
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{elseif $name eq 'Wilma'}
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Welcome Ma'am.
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{else}
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Welcome, whatever you are.
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{/if}
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{* an example with "or" logic *}
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{if $name eq 'Fred' or $name eq 'Wilma'}
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...
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{/if}
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{* same as above *}
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{if $name == 'Fred' || $name == 'Wilma'}
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...
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{/if}
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{* parenthesis are allowed *}
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{if ( $amount < 0 or $amount > 1000 ) and $volume >= #minVolAmt#}
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...
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{/if}
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{* you can also embed php function calls *}
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{if count($var) gt 0}
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...
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{/if}
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{* check for array. *}
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{if is_array($foo) }
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.....
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{/if}
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{* check for not null. *}
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{if isset($foo) }
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.....
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{/if}
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{* test if values are even or odd *}
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{if $var is even}
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...
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{/if}
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{if $var is odd}
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...
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{/if}
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{if $var is not odd}
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...
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{/if}
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{* test if var is divisible by 4 *}
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{if $var is div by 4}
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...
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{/if}
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{*
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test if var is even, grouped by two. i.e.,
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0=even, 1=even, 2=odd, 3=odd, 4=even, 5=even, etc.
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*}
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{if $var is even by 2}
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...
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{/if}
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{* 0=even, 1=even, 2=even, 3=odd, 4=odd, 5=odd, etc. *}
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{if $var is even by 3}
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...
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{/if}
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{if isset($name) && $name == 'Blog'}
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{* do something *}
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{elseif $name == $foo}
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{* do something *}
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{/if}
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{if is_array($foo) && count($foo) > 0}
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{* do a foreach loop *}
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{/if}
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