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The _utf8 header along with a Unicode character is to ensure that
- At least one Unicode character is submitted to the server
- Force certain non-compliant browsers to respect the form's character encoding
In some cases, the _utf8 header is given a value of a ☃ and sometimes it is a ✓. What it is doesn't really matter and may have arbitrarily been chosen for fun.
于 2012-12-10T08:43:06.607 回答