or ViewHelper <vhs:or> 

If content is empty use alternative text (can also be LLL:labelname shortcut or LLL:EXT: file paths).

Arguments 

content 

DataType
mixed
Required
false
Description
Input to either use, if not empty

alternative 

DataType
mixed
Required
false
Description
Alternative if content is empty, can use LLL: shortcut

arguments 

DataType
mixed
Required
false
Description
Arguments to be replaced in the resulting string

extensionName 

DataType
string
Required
false
Description
UpperCamelCase extension name without vendor prefix