Why can't I display the hyperlink I wrote when I refresh the page?

Why is there no hyperlink I wrote after the page is refreshed? why cannot the hyperlink I wrote be displayed after the page is refreshed? the code is as follows: & lt; td & gt; & nbsp; & lt; a & nbsp; href = "& lt ;? Php & nbsp; echo & nbsp why does the hyperlink I wrote disappear after refreshing the page?
Dear friends, why can't the hyperlink I wrote be displayed after the page is refreshed? the code is as follows:

"Target = _ blank>

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