for change /replace unreadable ascii variable to readable .

clearvars.php

<?php
/*
		this to replace all php ascii variable to human readable
		author: motebaya
		gihtub.com/motebaya
*/
function utf8($utf){
	return iconv('UTF-8', 'ISO-8859-1', $utf);
}

function clearvar($fn, $out){
	$file = utf8_encode(file_get_contents($fn));
	if (preg_match_all('/(?:\\$[\\x{0080}-\\x{FFFF}]+)(?=\\W)/u', $file, $code)) {
		$vars = array_unique($code[0]);
		$word = preg_split("/\r\n|\n|\r/", file_get_contents("word.txt"));
		foreach ($vars as $i => $cd) {
			$vm = "\${$word[$i]}";
			$file = str_replace($cd, $vm, $file);
		}
		if (file_put_contents($out, utf8($file))) {
			die(" - saved in {$out}");
		}
	}
}

if (count($argv) < 3){
	die("usage: php main.php <file/php> <out/php>");
} else {
	clearvar($argv[1], $argv[2]);
}
?>

here for get word.txt file https://gist.github.com/motebaya/6d9a7e33591247a9723e862dab2b4d20