how to get data to javascript from php using json_encode?

Question

I am trying to map traceroutes to google maps.

I have an array in php with traceroute data as

$c=ip,latitude,longitude, 2nd ip, its latitude, longitu         


        

Answer 1

I recommend using the jQuery library. The minified version only has 31 kB in size and provides lots of useful functions.

For parsing JSON, simply do

var obj = jQuery.parseJSON ( ' {"name" : "John"} ' );

You can now access everything easily:

alert ( obj.name );

Note: jQuery uses the browser's native JSON parser - if available - which is very quick and much safer then using the eval () method.

Edit: To get data from the server side to the client side, there are two possibilities:

1.) Use an AJAX request (quite simple with jQuery):

   $.ajax ( {
       url: "yourscript.php",
       dataType: "json",
       success: function ( data, textStatus, jqXHR ) {
           // process the data, you only need the "data" argument
           // jQuery will automatically parse the JSON for you!
       }
   } );

2.) Write the JSON object into the Javascript source code at page generation: