:sig
String html_escape(String s)

:params
s : string to be escaped
return value : an HTML-safe escaped version of 's'

:see
>string
json_encode
print
component

:content
Returns a version of the input string where special HTML characters are replaced by entities:

- `&` becomes `&amp;`
- `<` becomes `&lt;`
- `>` becomes `&gt;`
- `"` becomes `&quot;`

## Related Concepts

- PHP: `htmlspecialchars()` or `htmlentities()`
- JavaScript / Node.js: safe text insertion via `textContent` or server-side HTML escaping libraries
