55 lines
2.2 KiB
Markdown
55 lines
2.2 KiB
Markdown
# Embedding Vars in Double Quotes
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- Smarty will recognize [assigned](../../programmers/api-functions/api-assign.md)
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[variables](./language-syntax-variables.md) embedded in "double
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quotes" so long as the variable name contains only numbers, letters
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and under_scores. See [naming](https://www.php.net/language.variables)
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for more detail.
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- With any other characters, for example a period(.) or
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`$object->reference`, then the variable must be surrounded by `` `backticks` ``.
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- In addition, Smarty does allow embedded Smarty tags in double-quoted
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strings. This is useful if you want to include variables with
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modifiers, plugin or PHP function results.
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## Examples
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```smarty
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{func var="test $foo test"} // sees $foo
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{func var="test $foo_bar test"} // sees $foo_bar
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{func var="test `$foo[0]` test"} // sees $foo[0]
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{func var="test `$foo[bar]` test"} // sees $foo[bar]
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{func var="test $foo.bar test"} // sees $foo (not $foo.bar)
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{func var="test `$foo.bar` test"} // sees $foo.bar
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{func var="test `$foo.bar` test"|escape} // modifiers outside quotes!
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{func var="test {$foo|escape} test"} // modifiers inside quotes!
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{func var="test {time()} test"} // PHP function result
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{func var="test {counter} test"} // plugin result
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{func var="variable foo is {if !$foo}not {/if} defined"} // Smarty block function
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{* will replace $tpl_name with value *}
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{include file="subdir/$tpl_name.tpl"}
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{* does NOT replace $tpl_name *}
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{include file='subdir/$tpl_name.tpl'} // vars require double quotes!
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{* must have backticks as it contains a dot "." *}
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{cycle values="one,two,`$smarty.config.myval`"}
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{* must have backticks as it contains a dot "." *}
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{include file="`$module.contact`.tpl"}
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{* can use variable with dot syntax *}
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{include file="`$module.$view`.tpl"}
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```
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> **Note**
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>
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> Although Smarty can handle some very complex expressions and syntax,
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> it is a good rule of thumb to keep the template syntax minimal and
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> focused on presentation. If you find your template syntax getting too
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> complex, it may be a good idea to move the bits that do not deal
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> explicitly with presentation to PHP by way of plugins or modifiers.
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See also [`escape`](../language-modifiers/language-modifier-escape.md).
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