HTML output minifier for PHP

<?php
/**
 * HTML output minifier
 * @author Jefrey <jefrey[at]jefrey[dot]ml>
 * /

/*
Include this code **at the end** of all your scripts that produces output you want to be minified (or use auto_prepend_file in .htaccess or php.ini, if supported by your host).
This is supposed to be a simple solution, a trick/workaround (whatever you want to call this). If you want something more professional consider choosing a framework or dependency.

Known issues:
 - Text between <textarea> and <code> will also lose tabs/new lines.
*/
$buffer = ob_get_clean();

// remove duplicated spaces
while(strpos($buffer, "  ")) {
    $buffer = str_replace("  ", " ", $buffer);
}

// remove tabulation
$buffer = str_replace("\t", null, $buffer);

// remove newlines
$buffer = str_replace("\n", null, $buffer);
$buffer = str_replace("\r", null, $buffer);

echo $buffer;