/* PHP.js - strip_tags */
function strip_tags (str, allowed_tags) {
	// Strips HTML and PHP tags from a string
	var key = '', allowed = false;
	var matches = [];
	var allowed_array = [];
	var allowed_tag = '';
	var i = 0;
	var k = '';
	var html = ''; 
	var replacer = function (search, replace, str) {
		return str.split(search).join(replace);
	};
	// Build allowes tags associative array
	if (allowed_tags) {
		allowed_array = allowed_tags.match(/([a-zA-Z0-9]+)/gi);
	}
	str += '';

	// Match tags
	matches = str.match(/(<\/?[\S][^>]*>)/gi);
	// Go through all HTML tags
	for (key in matches) {
		if (isNaN(key)) {
			// IE7 Hack
			continue;
		}

		// Save HTML tag
		html = matches[key].toString();
		// Is tag not in allowed list? Remove from str!
		allowed = false;

		// Go through all allowed tags
		for (k in allowed_array) {
			// Init
			allowed_tag = allowed_array[k];
			i = -1;

			if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+'>');}
			if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+' ');}
			if (i != 0) { i = html.toLowerCase().indexOf('</'+allowed_tag) ;}

			// Determine
			if (i == 0) {
				allowed = true;
				break;
			}
		}
		if (!allowed) {
			str = replacer(html, "", str); // Custom replace. No regexing
		}
	}
	return str;
}