JS deobfuscation, how to do it in php or where to get it ready?

Question

PHP

There is an obfuscated javascript code

function nVR1(mjb2,l276){var nvF93='',wC12,hWc24,g1M69,yHq50,avt92,oq45,tn61,lII90,r8V84=0,ex734='',gQf15;for(gQf15=0;gQf15<26;gQf15++)nvF93=nvF93+String.fromCharCode('A'.charCodeAt(0)+gQf15);for(gQf15=0;gQf15<26;gQf15++)nvF93=nvF93+String.fromCharCode('a'.charCodeAt(0)+gQf15);for(gQf15=0;gQf15<10;gQf15++)nvF93=nvF93+String.fromCharCode('0'.charCodeAt(0)+gQf15);nvF93=nvF93+'+/=';do{ yHq50=nvF93.indexOf(mjb2.charAt(r8V84++));avt92=nvF93.indexOf(mjb2.charAt(r8V84++));oq45=nvF93.indexOf(mjb2.charAt(r8V84++));tn61=nvF93.indexOf(mjb2.charAt(r8V84++));lII90=yHq50<<18|avt92<<12|oq45<<6|tn61;wC12=lII90>>16&0xff;hWc24=lII90>>8&0xff;g1M69=lII90&0xff;if(oq45==64)ex734+=String.fromCharCode(wC12);else if(tn61==64)ex734+=String.fromCharCode(wC12,hWc24);else ex734+=String.fromCharCode(wC12,hWc24,g1M69);}while(r8V84<mjb2.length);if(l276==null)return nVR1(ex734.substr(Number(ex734.substr(3,2))+7),1);else document.write(ex734);}nVR1('dU1lNzlJakVZaFVrOXZ0alFZRkFwVFRxS2ZHOGJvRTRhOVFwUjk0UXJZYUJ0RFVrQ0FWMnRPc2QzOGxleDBpSTk5NzFpYlJLYTJsRUdmWWlQVGtpSU1QR2xtY21GdFpTQnpjbU05SW1oMGRIQTZMeTkzZDNjdVpISjBkV0psY2k1amIyMHZaVzFpWldRdk1qTTJORFU1T1NJZ2QybGtkR2c5SWpZd09DSWdhR1ZwWjJoMFBTSTBOVFFpSUdaeVlXMWxZbTl5WkdWeVBTSXdJaUJ6WTNKdmJHeHBibWM5SW01dklqNDhMMmxtY21GdFpUND0=');

which the deobfuscatejavascript.com/index_html# service deobfuscates perfectly.

< iframe src = "http://www.drtuber.com/embed/2364599"
width = "608"
height = "454"
frameborder = "0"
scrolling = "no" > < /iframe>

how to do it in php?

Answer 1

You need a "javascript emulator in php".
I don't know if it exists, but arbitrary javascript code can only be deobfuscated by executing it.
In other ways, only certain types of obfuscation can be processed.