Question

I need to detect HTML5 Geolocation support using PHP so that I can load a backup JavaScript that supports Geolocation using IP Address.

How to do this with or without PHP.

Answer 1

Have you considered using Modernizr to detect the HTML5 support? This isn’t PHP specific since it’s done in JavaScript but you can use this snippet to load your backup file:

if (Modernizr.geolocation){
   // Access using HTML5
   navigator.geolocation.getCurrentPosition(function(position) { ... });
}else{
   // Load backup file
   var script = document.createElement('script');
   script.src = '/path/to/your/script.js';
   script.type = 'text/javascript';
   var head = document.getElementsByTagName("head")[0];
   head.appendChild(script);
}

(Based on http://www.modernizr.com/docs/#geolocation)