PHP var_export() reading in Node.js

config.js

var sys = require('sys');
var fs = require('fs');

var parseConfigFile = function (str) {
	str = str.replace('<?php', '');
	str = str.replace('?>', '');
	str = str.replace(';', '');
	str = str.replace('return ', '');
	str = str.replace(/'([a-zA-Z0-9\_\-]+)'\s+=>\s/g, '"$1": ');
	str = str.replace(/array \(/g, '{');
	str = str.replace(/\)/g, '}');
	str = str.replace(/\s+/g, ' ');
	str = str.replace(/,\s*}/g, '}');
	str = str.replace(/'([^\r\n'""]*)'/g, '"$1"');

	return JSON.parse(str);
};

var Config = function (filename) {
	this._filename = filename;

	console.log('Loading %s...', filename);
	this.load(function (err, data) {
		if (err) return _this.emit('error', err);

		_this.emit('load', data);
		console.log('%s loaded!', filename);
	});

	var _this = this;

	fs.watchFile(filename, function (curr, prev) {
		if (curr.mtime === prev.mtime) return;

		console.log('Reloading %s...', filename);
		_this.load(function (err, data) {
			if (err) return _this.emit('error', err);

			_this.emit('load', data);
			console.log('%s loaded!', filename);
		});
	});
};

sys.inherits(Config, process.EventEmitter);

Config.prototype.load = function (cb) {
	this.obj = {};

	var _this = this;

	fs.readFile(this._filename, 'utf8', function (err, data) {
		if (err) return cb(err);

		try {
			var config = parseConfigFile(data);
			_this.obj = config;

			return cb(null, config);
		} catch (err) {
			return cb(err);
		}
	});
}

module.exports = Config;