(help) js to php function

please help me to convert js to php function thanks function get_browser(){ var N=navigator.appName, ua=navigator.userAgent, tem; var M=ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i); if(M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1]; M=M? [M[1], M[2]]: [N, navigator.appVersion, '-?']; return M[0]; }