Simple string obfuscation for .java files

String Obfuscation.php

<?php

	/*
		Simple java string encryption
	*/

	// The function to encrypt, you can put the encrypt function in each class too.
	$encrypt_function = 'Crypto.decrypt';
	
	// Your main client class
	$packages = 'Main.java';
	
	// The packages to obfuscate, regex.
	$packages .= ',Mods\/([A-Z])\w+\.java';

	function encrypt($str) {
		// Your encrypt code
		return '"'.$str.'"';
	}
	
	function decrypt($str) {
		// Your decrypt code
		return '"'.$str.'"';
	}
	
	function deObfuscate($file) {
		global $encrypt_function;
		$contents = file_get_contents($file);
		if (strpos($contents,$encrypt_function) === false) {
			echo 'File '.$file.' is not obfuscated'.PHP_EOL;
			return;
		}
		echo 'Deobfuscating file '.$file.' {'.PHP_EOL;
		$regex = '/'.'"(?:\\\"|[^"])*"'.'/mi';
		preg_match_all($regex,$contents,$matches);
		foreach ($matches[0] as $match) {
			if ($match == '""' || $match == '" "') {
				continue;
			}
			echo "\t".'Deobfuscating: '.$match.PHP_EOL;
			echo "\t\t".'New string: '.decrypt($match).PHP_EOL;
			$contents = str_replace($encrypt_function.'('.$match.')',decrypt($match),$contents);
		}
		file_put_contents($file,$contents);
		echo '}'.PHP_EOL;
	}

	function obfuscate($file) {
		global $encrypt_function;
		$contents = file_get_contents($file);
		if (strpos($contents,$encrypt_function) !== false) {
			echo 'File '.$file.' is already obfuscated'.PHP_EOL;
			return;
		}
		echo 'Obfuscating file '.$file.' {'.PHP_EOL;
		$regex = '/'.'"(?:\\\"|[^"])*"'.'/mi';
		preg_match_all($regex,$contents,$matches);
		foreach ($matches[0] as $match) {
			if ($match == '""' || $match == '" "') {
				continue;
			}
			echo "\t".'Obfuscating: '.$match.PHP_EOL;
			echo "\t\t".'New string: '.$encrypt_function.'('.encrypt($match).')'.PHP_EOL;
			$contents = str_replace($match,$encrypt_function.'('.encrypt($match).')',$contents);
		}
		$contents = str_replace('','',$contents);
		file_put_contents($file,$contents);
		echo '}'.PHP_EOL;
	}

	$di = new RecursiveDirectoryIterator('./');
	foreach (new RecursiveIteratorIterator($di) as $filename => $file) {
		$filename = substr($filename,2);
		$flag = false;
		if (strpos($filename,'.java') === false) {
			continue;
		}
		foreach (explode(',',$packages) as $package) {
			if (strpos($package,',') !== false) {
				$package = substr($package,1);
			}
			if (preg_match('/'.$package.'/im',$filename)) {
				$flag = true;
				break;
			}
		}
		if ($flag == false) {
			continue;
		}
		obfuscate($filename);
	}

?>