diff --git a/lib/string.js b/lib/string.js
index 699b72c..48854e7 100644
--- a/lib/string.js
+++ b/lib/string.js
@@ -360,6 +360,22 @@ string.js - Copyright (C) 2012-2013, JP Richardson <jprichardson@gmail.com>
       return new this.constructor(s);
     },
 
+    allowTags: function(allowed) { //from php.js
+      var raw = this.s, args = arguments.length > 0 ? arguments : [''];
+       allowed = (((allowed || '') + '')
+            .toLowerCase()
+            .match(/<[a-z][a-z0-9]*>/g) || [])
+            .join(''); // making sure the allowed arg is a string containing only tags in lowercase (<a><b><c>)
+        var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,
+            commentsAndPhpTags = /<!--[\s\S]*?-->|<\?(?:php)?[\s\S]*?\?>/gi;
+        var s = raw.replace(commentsAndPhpTags, '')
+            .replace(tags, function ($0, $1) {
+                return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
+            });
+
+      return new this.constructor(s);
+    },
+
     template: function(values, opening, closing) {
       var s = this.s
       var opening = opening || Export.TMPL_OPEN
diff --git a/lib/string.min.js b/lib/string.min.js
index 647a4f7..d6be0b5 100644
--- a/lib/string.min.js
+++ b/lib/string.min.js
@@ -1,3 +1 @@
-/*
-string.js - Copyright (C) 2012-2013, JP Richardson <jprichardson@gmail.com>
-*/!function(){"use strict";function n(e,t){t!==null&&t!==undefined?typeof t=="string"?e.s=t:e.s=t.toString():e.s=t,e.orig=t,t!==null&&t!==undefined?e.__defineGetter__?e.__defineGetter__("length",function(){return e.s.length}):e.length=t.length:e.length=-1}function r(e){n(this,e)}function u(){for(var e in s)(function(e){var t=s[e];i.hasOwnProperty(e)||(o.push(e),i[e]=function(){return String.prototype.s=this,t.apply(this,arguments)})})(e)}function a(){for(var e=0;e<o.length;++e)delete String.prototype[o[e]];o.length=0}function c(){var e=h(),t={};for(var n=0;n<e.length;++n){var r=e[n],s=i[r];try{var o=typeof s.apply("teststring",[]);t[r]=o}catch(u){}}return t}function h(){var e=[];if(Object.getOwnPropertyNames)return e=Object.getOwnPropertyNames(i),e.splice(e.indexOf("valueOf"),1),e.splice(e.indexOf("toString"),1),e;var t={},n=[];for(var r in String.prototype)t[r]=r;for(var r in Object.prototype)delete t[r];for(var r in t)e.push(r);return e}function p(e){return new r(e)}function 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this.constructor(this.s.replace(/[^\w\s]|_/g,"").replace(/\s+/g," "))},stripTags:function(){var s=this.s,args=arguments.length>0?arguments:[""];multiArgs(args,function(tag){s=s.replace(RegExp("</?"+tag+"[^<>]*>","gi"),"")});return new this.constructor(s)},allowTags:function(allowed){var raw=this.s,args=arguments.length>0?arguments:[""];allowed=(((allowed||"")+"").toLowerCase().match(/<[a-z][a-z0-9]*>/g)||[]).join("");var tags=/<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,commentsAndPhpTags=/<!--[\s\S]*?-->|<\?(?:php)?[\s\S]*?\?>/gi;var s=raw.replace(commentsAndPhpTags,"").replace(tags,function($0,$1){return allowed.indexOf("<"+$1.toLowerCase()+">")>-1?$0:""});return new this.constructor(s)},template:function(values,opening,closing){var s=this.s;var opening=opening||Export.TMPL_OPEN;var closing=closing||Export.TMPL_CLOSE;var open=opening.replace(/[-[\]()*\s]/g,"\\$&").replace(/\$/g,"\\$");var close=closing.replace(/[-[\]()*\s]/g,"\\$&").replace(/\$/g,"\\$");var r=new RegExp(open+"(.+?)"+close,"g");var matches=s.match(r)||[];matches.forEach(function(match){var key=match.substring(opening.length,match.length-closing.length);if(typeof values[key]!="undefined")s=s.replace(match,values[key])});return new this.constructor(s)},times:function(n){return new this.constructor(new Array(n+1).join(this.s))},toBoolean:function(){if(typeof this.orig==="string"){var s=this.s.toLowerCase();return s==="true"||s==="yes"||s==="on"||s==="1"}else return this.orig===true||this.orig===1},toFloat:function(precision){var num=parseFloat(this.s);if(precision)return parseFloat(num.toFixed(precision));else return num},toInt:function(){return/^\s*-?0x/i.test(this.s)?parseInt(this.s,16):parseInt(this.s,10)},trim:function(){var s;if(typeof __nsp.trim==="undefined")s=this.s.replace(/(^\s*|\s*$)/g,"");else s=this.s.trim();return new this.constructor(s)},trimLeft:function(){var s;if(__nsp.trimLeft)s=this.s.trimLeft();else s=this.s.replace(/(^\s*)/g,"");return new this.constructor(s)},trimRight:function(){var s;if(__nsp.trimRight)s=this.s.trimRight();else s=this.s.replace(/\s+$/,"");return new this.constructor(s)},truncate:function(length,pruneStr){var str=this.s;length=~~length;pruneStr=pruneStr||"...";if(str.length<=length)return new this.constructor(str);var tmpl=function(c){return c.toUpperCase()!==c.toLowerCase()?"A":" "},template=str.slice(0,length+1).replace(/.(?=\W*\w*$)/g,tmpl);if(template.slice(template.length-2).match(/\w\w/))template=template.replace(/\s*\S+$/,"");else template=new S(template.slice(0,template.length-1)).trimRight().s;return(template+pruneStr).length>str.length?new S(str):new S(str.slice(0,template.length)+pruneStr)},toCSV:function(){var delim=",",qualifier='"',escape="\\",encloseNumbers=true,keys=false;var dataArray=[];function hasVal(it){return it!==null&&it!==""}if(typeof arguments[0]==="object"){delim=arguments[0].delimiter||delim;delim=arguments[0].separator||delim;qualifier=arguments[0].qualifier||qualifier;encloseNumbers=!!arguments[0].encloseNumbers;escape=arguments[0].escape||escape;keys=!!arguments[0].keys}else if(typeof arguments[0]==="string"){delim=arguments[0]}if(typeof arguments[1]==="string")qualifier=arguments[1];if(arguments[1]===null)qualifier=null;if(this.orig instanceof Array)dataArray=this.orig;else{for(var key in this.orig)if(this.orig.hasOwnProperty(key))if(keys)dataArray.push(key);else dataArray.push(this.orig[key])}var rep=escape+qualifier;var buildString=[];for(var i=0;i<dataArray.length;++i){var shouldQualify=hasVal(qualifier);if(typeof dataArray[i]=="number")shouldQualify&=encloseNumbers;if(shouldQualify)buildString.push(qualifier);if(dataArray[i]!==null&&dataArray[i]!==undefined){var d=new S(dataArray[i]).replaceAll(qualifier,rep).s;buildString.push(d)}else buildString.push("");if(shouldQualify)buildString.push(qualifier);if(delim)buildString.push(delim)}buildString.length=buildString.length-1;return new this.constructor(buildString.join(""))},toString:function(){return this.s},underscore:function(){var s=this.trim().s.replace(/([a-z\d])([A-Z]+)/g,"$1_$2").replace(/[-\s]+/g,"_").toLowerCase();if(new S(this.s.charAt(0)).isUpper()){s="_"+s}return new this.constructor(s)},unescapeHTML:function(){return new this.constructor(this.s.replace(/\&([^;]+);/g,function(entity,entityCode){var match;if(entityCode in escapeChars){return escapeChars[entityCode]}else if(match=entityCode.match(/^#x([\da-fA-F]+)$/)){return String.fromCharCode(parseInt(match[1],16))}else if(match=entityCode.match(/^#(\d+)$/)){return String.fromCharCode(~~match[1])}else{return entity}}))},valueOf:function(){return this.s.valueOf()}};var methodsAdded=[];function extendPrototype(){for(var name in __sp){(function(name){var func=__sp[name];if(!__nsp.hasOwnProperty(name)){methodsAdded.push(name);__nsp[name]=function(){String.prototype.s=this;return func.apply(this,arguments)}}})(name)}}function restorePrototype(){for(var i=0;i<methodsAdded.length;++i)delete String.prototype[methodsAdded[i]];methodsAdded.length=0}var nativeProperties=getNativeStringProperties();for(var name in nativeProperties){(function(name){var stringProp=__nsp[name];if(typeof stringProp=="function"){if(!__sp[name]){if(nativeProperties[name]==="string"){__sp[name]=function(){return new this.constructor(stringProp.apply(this,arguments))}}else{__sp[name]=stringProp}}}})(name)}__sp.repeat=__sp.times;__sp.include=__sp.contains;__sp.toInteger=__sp.toInt;__sp.toBool=__sp.toBoolean;__sp.decodeHTMLEntities=__sp.decodeHtmlEntities;__sp.constructor=S;function getNativeStringProperties(){var names=getNativeStringPropertyNames();var retObj={};for(var i=0;i<names.length;++i){var name=names[i];var func=__nsp[name];try{var type=typeof func.apply("teststring",[]);retObj[name]=type}catch(e){}}return retObj}function getNativeStringPropertyNames(){var results=[];if(Object.getOwnPropertyNames){results=Object.getOwnPropertyNames(__nsp);results.splice(results.indexOf("valueOf"),1);results.splice(results.indexOf("toString"),1);return results}else{var stringNames={};var objectNames=[];for(var name in String.prototype)stringNames[name]=name;for(var name in Object.prototype)delete stringNames[name];for(var name in stringNames){results.push(name)}return results}}function Export(str){return new S(str)}Export.extendPrototype=extendPrototype;Export.restorePrototype=restorePrototype;Export.VERSION=VERSION;Export.TMPL_OPEN="{{";Export.TMPL_CLOSE="}}";Export.ENTITIES=ENTITIES;if(typeof module!=="undefined"&&typeof module.exports!=="undefined"){module.exports=Export}else{if(typeof define==="function"&&define.amd){define([],function(){return Export})}else{window.S=Export}}function multiArgs(args,fn){var result=[],i;for(i=0;i<args.length;i++){result.push(args[i]);if(fn)fn.call(args,args[i],i)}return result}var escapeChars={lt:"<",gt:">",quot:'"',apos:"'",amp:"&"};var reversedEscapeChars={};for(var key in escapeChars){reversedEscapeChars[escapeChars[key]]=key}ENTITIES={amp:"&",gt:">",lt:"<",quot:'"',apos:"'",AElig:198,Aacute:193,Acirc:194,Agrave:192,Aring:197,Atilde:195,Auml:196,Ccedil:199,ETH:208,Eacute:201,Ecirc:202,Egrave:200,Euml:203,Iacute:205,Icirc:206,Igrave:204,Iuml:207,Ntilde:209,Oacute:211,Ocirc:212,Ograve:210,Oslash:216,Otilde:213,Ouml:214,THORN:222,Uacute:218,Ucirc:219,Ugrave:217,Uuml:220,Yacute:221,aacute:225,acirc:226,aelig:230,agrave:224,aring:229,atilde:227,auml:228,ccedil:231,eacute:233,ecirc:234,egrave:232,eth:240,euml:235,iacute:237,icirc:238,igrave:236,iuml:239,ntilde:241,oacute:243,ocirc:244,ograve:242,oslash:248,otilde:245,ouml:246,szlig:223,thorn:254,uacute:250,ucirc:251,ugrave:249,uuml:252,yacute:253,yuml:255,copy:169,reg:174,nbsp:160,iexcl:161,cent:162,pound:163,curren:164,yen:165,brvbar:166,sect:167,uml:168,ordf:170,laquo:171,not:172,shy:173,macr:175,deg:176,plusmn:177,sup1:185,sup2:178,sup3:179,acute:180,micro:181,para:182,middot:183,cedil:184,ordm:186,raquo:187,frac14:188,frac12:189,frac34:190,iquest:191,times:215,divide:247,"OElig;":338,"oelig;":339,"Scaron;":352,"scaron;":353,"Yuml;":376,"fnof;":402,"circ;":710,"tilde;":732,"Alpha;":913,"Beta;":914,"Gamma;":915,"Delta;":916,"Epsilon;":917,"Zeta;":918,"Eta;":919,"Theta;":920,"Iota;":921,"Kappa;":922,"Lambda;":923,"Mu;":924,"Nu;":925,"Xi;":926,"Omicron;":927,"Pi;":928,"Rho;":929,"Sigma;":931,"Tau;":932,"Upsilon;":933,"Phi;":934,"Chi;":935,"Psi;":936,"Omega;":937,"alpha;":945,"beta;":946,"gamma;":947,"delta;":948,"epsilon;":949,"zeta;":950,"eta;":951,"theta;":952,"iota;":953,"kappa;":954,"lambda;":955,"mu;":956,"nu;":957,"xi;":958,"omicron;":959,"pi;":960,"rho;":961,"sigmaf;":962,"sigma;":963,"tau;":964,"upsilon;":965,"phi;":966,"chi;":967,"psi;":968,"omega;":969,"thetasym;":977,"upsih;":978,"piv;":982,"ensp;":8194,"emsp;":8195,"thinsp;":8201,"zwnj;":8204,"zwj;":8205,"lrm;":8206,"rlm;":8207,"ndash;":8211,"mdash;":8212,"lsquo;":8216,"rsquo;":8217,"sbquo;":8218,"ldquo;":8220,"rdquo;":8221,"bdquo;":8222,"dagger;":8224,"Dagger;":8225,"bull;":8226,"hellip;":8230,"permil;":8240,"prime;":8242,"Prime;":8243,"lsaquo;":8249,"rsaquo;":8250,"oline;":8254,"frasl;":8260,"euro;":8364,"image;":8465,"weierp;":8472,"real;":8476,"trade;":8482,"alefsym;":8501,"larr;":8592,"uarr;":8593,"rarr;":8594,"darr;":8595,"harr;":8596,"crarr;":8629,"lArr;":8656,"uArr;":8657,"rArr;":8658,"dArr;":8659,"hArr;":8660,"forall;":8704,"part;":8706,"exist;":8707,"empty;":8709,"nabla;":8711,"isin;":8712,"notin;":8713,"ni;":8715,"prod;":8719,"sum;":8721,"minus;":8722,"lowast;":8727,"radic;":8730,"prop;":8733,"infin;":8734,"ang;":8736,"and;":8743,"or;":8744,"cap;":8745,"cup;":8746,"int;":8747,"there4;":8756,"sim;":8764,"cong;":8773,"asymp;":8776,"ne;":8800,"equiv;":8801,"le;":8804,"ge;":8805,"sub;":8834,"sup;":8835,"nsub;":8836,"sube;":8838,"supe;":8839,"oplus;":8853,"otimes;":8855,"perp;":8869,"sdot;":8901,"lceil;":8968,"rceil;":8969,"lfloor;":8970,"rfloor;":8971,"lang;":9001,"rang;":9002,"loz;":9674,"spades;":9824,"clubs;":9827,"hearts;":9829,"diams;":9830}}.call(this);
\ No newline at end of file
diff --git a/test/string.test.js b/test/string.test.js
index 8024e72..82534b5 100644
--- a/test/string.test.js
+++ b/test/string.test.js
@@ -466,6 +466,14 @@
       })
     })
 
+    describe('- allowTags([tag1],[tag2],...)', function() {
+      it('should strip all of the html tags or allow tags specified by the parameters', function() {
+        T (S('<p>just <b>some</b> text</p>').allowTags().s === 'just some text')
+        T (S('<p>just <b>some</b> text</p>').allowTags('<p>').s === '<p>just some text</p>')
+        T (S('<p>just <b>some</b> text<span> this is a span</span></p>').allowTags('<p><span>').s === '<p>just some text<span> this is a span</span></p>')
+      })
+    })
+
     describe('- template(values, [open], [close])', function() {
       it('should return the string replaced with template values', function() {
         var str = "Hello {{name}}! How are you doing during the year of {{date-year}}?"