Questions about using the definition symbol

Use of the definition symbol. ClassWork {publicfunctionsetXml () {$ _ xml = & lt; eofeof ;}} this will display the error cannotreclarefunctionsetxml, but I can use this delimiter in the function. Is it possible that the delimiter cannot be used again.
Class Work {

Public function setXml (){
$ _ Xml = <
Eof;
}
}
This will display the error cannot reclare function setxml
But there is no problem if I use this delimiter in a function. isn't the delimiter no longer available in class methods?


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Yes. This is all the code?
------ Solution --------------------
Class can use the delimiter
Check whether setXml () is defined elsewhere in your class ()
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Http://www.php.net/manual/zh/language.types.string.php#language.types.string.syntax.heredoc
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This is because of your eof; followed by a TAB character