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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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FGETSS(3)								 1								 FGETSS(3)

fgetss - Gets line from file pointer and strip HTML tags

SYNOPSIS
string fgetss (resource $handle, [int $length], [string $allowable_tags]) DESCRIPTION
Identical to fgets(3), except that fgetss(3) attempts to strip any NUL bytes, HTML and PHP tags from the text it reads. PARAMETERS
o $handle -The file pointer must be valid, and must point to a file successfully opened by fopen(3) or fsockopen(3) (and not yet closed by fclose(3)). o $length - Length of the data to be retrieved. o $allowable_tags - You can use the optional third parameter to specify tags which should not be stripped. RETURN VALUES
Returns a string of up to $length - 1 bytes read from the file pointed to by $handle, with all HTML and PHP code stripped. If an error occurs, returns FALSE. Example #1 Reading a PHP file line-by-line <?php $str = <<<EOD <html><body> <p>Welcome! Today is the <?php echo(date('jS')); ?> of <?= date('F'); ?>.</p> </body></html> Text outside of the HTML block. EOD; file_put_contents('sample.php', $str); $handle = @fopen("sample.php", "r"); if ($handle) { while (!feof($handle)) { $buffer = fgetss($handle, 4096); echo $buffer; } fclose($handle); } ?> The above example will output something similar to: Welcome! Today is the of . Text outside of the HTML block. NOTES
Note If PHP is not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the auto_detect_line_endings run-time configuration option may help resolve the problem. SEE ALSO
fgets(3), fopen(3), popen(3), fsockopen(3), strip_tags(3). PHP Documentation Group FGETSS(3)
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