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202 lines
4.7 KiB
Markdown
202 lines
4.7 KiB
Markdown
# {block}
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`{block}` is used to define a named area of template source for template
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inheritance. For details see section of [Template
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Inheritance](../../programmers/advanced-features/advanced-features-template-inheritance.md).
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The `{block}` template source area of a child template will replace the
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corresponding areas in the parent template(s).
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Optionally `{block}` areas of child and parent templates can be merged
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into each other. You can append or prepend the parent `{block}` content
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by using the `append` or `prepend` option flag with the child's `{block}`
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definition. With `{$smarty.block.parent}` the `{block}` content of
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the parent template can be inserted at any location of the child
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`{block}` content. `{$smarty.block.child}` inserts the `{block}` content
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of the child template at any location of the parent `{block}`.
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`{blocks}'s` can be nested.
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## Attributes
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| Attribute Name | Required | Description |
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|----------------|----------|----------------------------------------------------------------------------------------------------------------------|
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| name | yes | The name of the template source block |
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| assign | no | The name of variable to assign the output of the block to. |
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> **Note**
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>
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> The assign attribute only works on the block that actually gets executed, so you may need
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> to add it to each child block as well.
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## Option Flags (in child templates only):
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| Name | Description |
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|---------|-----------------------------------------------------------------------------------------|
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| append | The `{block}` content will be appended to the content of the parent template `{block}` |
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| prepend | The `{block}` content will be prepended to the content of the parent template `{block}` |
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| hide | Ignore the block content if no child block of same name is existing. |
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| nocache | Disables caching of the `{block}` content |
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## Examples
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parent.tpl
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```smarty
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<html>
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<head>
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<title>{block name="title"}Default Title{/block}</title>
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<title>{block "title"}Default Title{/block}</title> {* short-hand *}
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</head>
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</html>
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```
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child.tpl
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```smarty
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{extends file="parent.tpl"}
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{block name="title"}
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Page Title
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{/block}
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```
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The result would look like
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```html
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<html>
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<head>
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<title>Page Title</title>
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</head>
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</html>
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```
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parent.tpl
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```smarty
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<html>
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<head>
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<title>{block name="title"}Title - {/block}</title>
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</head>
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</html>
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```
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child.tpl
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```smarty
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{extends file="parent.tpl"}
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{block name="title" append}
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Page Title
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{/block}
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```
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The result would look like
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```html
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<html>
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<head>
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<title>Title - Page Title</title>
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</head>
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</html>
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```
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parent.tpl
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```smarty
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<html>
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<head>
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<title>{block name="title"} is my title{/block}</title>
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</head>
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</html>
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```
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child.tpl
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```smarty
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{extends file="parent.tpl"}
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{block name="title" prepend}
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Page Title
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{/block}
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```
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The result would look like
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```html
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<html>
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<head>
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<title>Page title is my titel</title>
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</head>
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</html>
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```
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parent.tpl
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```smarty
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<html>
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<head>
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<title>{block name="title"}The {$smarty.block.child} was inserted here{/block}</title>
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</head>
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</html>
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```
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child.tpl
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```smarty
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{extends file="parent.tpl"}
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{block name="title"}
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Child Title
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{/block}
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```
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The result would look like
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```html
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<html>
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<head>
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<title>The Child Title was inserted here</title>
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</head>
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</html>
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```
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parent.tpl
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```smarty
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<html>
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<head>
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<title>{block name="title"}Parent Title{/block}</title>
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</head>
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</html>
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```
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child.tpl
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```smarty
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{extends file="parent.tpl"}
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{block name="title"}
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You will see now - {$smarty.block.parent} - here
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{/block}
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```
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The result would look like
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```html
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<html>
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<head>
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<title>You will see now - Parent Title - here</title>
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</head>
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</html>
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```
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See also [Template
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Inheritance](../../programmers/advanced-features/advanced-features-template-inheritance.md),
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[`$smarty.block.parent`](../language-variables/language-variables-smarty.md#smartyblockparent-languagevariablessmartyblockparent),
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[`$smarty.block.child`](../language-variables/language-variables-smarty.md#smartyblockchild-languagevariablessmartyblockchild), and
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[`{extends}`](./language-function-extends.md)
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