Uri.external ViewHelper <f:uri.external> 

ViewHelper for creating URIs to external targets, enforcing a specific scheme (https by default). The specified URI is passed through without further resolving or transformation.

Go to the source code of this ViewHelper: Uri\ExternalViewHelper.php (GitHub).

Examples 

Default 

packages/my_extension/Resources/Private/Templates/Blog/Show.fluid.html
<f:uri.external uri="https://www.typo3.org" />
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Output
https://www.typo3.org
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Custom default scheme 

packages/my_extension/Resources/Private/Templates/Blog/Show.fluid.html
<f:uri.external uri="typo3.org" defaultScheme="ftp" />
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Output
ftp://typo3.org
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Arguments of the <f:uri.external> ViewHelper 

defaultScheme

defaultScheme
Type
string
Default
'https'
scheme the href attribute will be prefixed with if specified $uri does not contain a scheme already

uri

uri
Type
string
Required
1
target URI