You could use "encode_entities" from HTML::Entities which is explicitly designed for this, or,
from the CGI module, use: 
$escaped_string = escapeHTML("<unescaped> string");
#Escape HTML formatting characters in a string.

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In reply to Re: HTML code escaped from web page on browser by NetWallah
in thread HTML code escaped from web page on browser by sylph001

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
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    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
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    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
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