The html_writer nonempty_tag function belongs to the HTML Writer package library in PHP which provides a set of functions to simplify writing HTML code.
This function generates an HTML tag with specified attributes and content only if the content is not empty. It takes three parameters; the tag name (string), an array of attributes (key-value pairs), and the content (string).
Example 1: Let's say we want to create a div tag with a class of "message" and content "Hello World!". If the content is empty, we don't want the tag to be generated at all.
In this example, we use the nonempty_tag function to create a div tag with the specified attributes and content only if the $content variable is not empty. If it is empty, $html will be an empty string.
Example 2: Another example is when we want to create an ordered list (ol) tag with several list items (li) with varying content.
In this example, we use the nonempty_tag function inside a loop to generate list items only if they are not empty. We also use the start_tag and end_tag functions to generate the opening and closing ol tags respectively.
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