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Top Forums UNIX for Beginners Questions & Answers How to remove unused html codes from the file using UNIX? Post 303037665 by Neo on Friday 9th of August 2019 05:59:54 AM
Old 08-09-2019
There are specific PHP commands which will transform HTML files and strip out certain HTML entities, for example:

Code:
<?php
echo strip_tags("Hello <b>world!</b>");
?>

See also:

Code:
strip_tags ( string $str [, string $allowable_tags ] ) : string

Reference:

PHP: strip_tags - Manual

However, you might also find joy with

Code:
htmlspecialchars ( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = ini_get("default_charset") [, bool $double_encode = TRUE ]]] ) : string

... depending on your exact requirements:

PHP: htmlspecialchars - Manual

Or even:

PHP: htmlentities - Manual

Please keep in mind that "web-centric" programming languages like PHP and others have a rich set of commands built to transform and process HTML files; and most web developers, including me, use these tools to make the transformation(s) you are considering.

PHP runs "just fine" from the "UNIX" or "Linux" command line in most modern operating systems.

But, as Don mentioned, without knowing the details of your OS, we are just shooting in the dark.
 

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HTMLCLEAN(1p)						User Contributed Perl Documentation					     HTMLCLEAN(1p)

NAME
htmlclean - a small script to clean up existing HTML SYNOPSIS
htmlclean [-v] [-V] file1 [file2 file3 ...] DESCRIPTION
This program provides a command-line interface to the HTML::Clean module, which can help you to provide more compatible, smaller HTML files at the expense of reducing the human readability of the HTML code. In some cases you may be able to reduce the size of your HTML by up to 50%! The HTML::Clean library provides a number of features that improve your HTML for browsing and serving: htmlclean passes each file given on the command line to the library and writes out the new HTML according to the specified options. The default is to create a backup file and replace the file with cleaned HTML. Removing whitespace, Comments and other useless or redundant constructs Insuring that font tags work across multiple operating systems For full details see the documentations for HTML::Clean itself. OPTIONS
"-V" Print the version of the program. "-v" Verbose mode. Print out the original and final file sizes, plus the compression percent. For example: 5261 4065 22% /tmp/development-es.html 5258 4061 22% /tmp/development-fr.html 4651 3683 20% /tmp/development.html SEE ALSO
For the library, see HTML::Clean AUTHOR
"htmlclean" is written by Paul Lindner, <paul.lindner@itu.int> COPYRIGHT
Copyright (c> 1998 by ITU under the same terms as Perl. perl v5.8.8 2001-01-09 HTMLCLEAN(1p)
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