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The characters c("&", '"', "'", "<", ">") will be replaced with c("&", """, "'", "<", ">"), respectively.
c("&", '"', "'", "<", ">")
c("&", """, "'", "<", ">")
htmlspecialchars(string)
the string with special chars replaced.
the string with (or w/o) HTML special chars
Yihui Xie <https://yihui.org>
https://www.php.net/manual/en/function.htmlspecialchars.php
gsub
htmlspecialchars("Yihui") # <a href = 'https://yihui.org'>Yihui</a>
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