Seems like a convoluted way to do whatever this is, but yeah, here's a simple way to generate that - all untested and may contain stupid bugs because I've got a headache, but here you go...

First build the array of weeks:

    $marking = [ strtotime('sunday') * 1000 ];
    for ( var $i = 1 ; $i <= 52 ; $i++ )
        $marking[i] = strtotime((-1*$i).' week sunday') * 1000;

Then re-map each one into the desired format (use a better function name):

    function convert_to_my_format( $CurMarking )
    {
        return "{ xaxis: { from: ".($CurMarking+10000000).", to: ".($CurMarking-96400000)." }, color: \"#F3F3ED\" }";
    }

    $markings = array_map( "convert_to_my_format" , $marking );

Finally convert that array into a comma-delimited string:

    $markings = implode( "," , $markings );

Thanks BP. I'll give that a go tomorrow.

Right, we're close!

If I include the var in the 2nd line I get a 500 server error.

With it removed it outputs the 52nd and final part of the array but not the full array, I've checked by changing the 52 to another number.
 

   for ( $i = 1 ; $i <= 52 ; $i++ )
        $marking[i] = strtotime((-1*$i).' week sunday') * 1000;

   function convert_to_markings( $CurMarking )
    {
        return "{ xaxis: { from: ".($CurMarking).", to: ".($CurMarking-96400000)." }, color: \"#F3F3ED\" }";
    }

    $markings = array_map( "convert_to_markings" , $marking );

    $markings = implode( "," , $markings );

Output from that is
 

{ xaxis: { from: 1425168000000, to: 1425071600000 }, color: "#F3F3ED" }

Please help Peter!

There's a missing $ in the for loop code. $marking[i] should be $marking[$i]

Dunno if that will fix it though.

I have literally just spotted that, working now :D

Good timing :D Glad it's working.

It nicely highlights the weekends on my electricity usage chart.

Bah! Damn PHP and its stupid dollars.

Is that from the camera you have pointing at your electric meter?

Who puts dollar symbols in front of variable names? :(

jquery. Well, in front of selectors.

That's the one.

I was originally just putting it in a spreadsheet and trawling through a load of readings every week or so (never got OCR working).

But now I've got it all in a MySQL database where I've got a little form that checks the last row in the database, then checks the date and displays the image for the next reading I need to enter, once entered it calculates the usage that day and the cost that day and adds them to the database. Data stored is - date, total meter reading, daily usage, cost. When it's up to date it tells me there's nothing more to add.

 
 

The last 12 Weeks

Idiots who blindly copy bits of shell script into a toy language without really knowing what they're doing, and then come up with lame justifications of why they shouldn't fix the nonsense when everyone uses the damned thing. Probably.

A perfect example!

...of an idiot who doesn't know what things are. :S

Hmm, bit harsh? Maybe just a dunce. (hug)

jQuery neither prefixes variable names not puts dollars in front of selectors. It aliases itself as $, and as a function it can have arguments, the first of which can be a selector, though it also can be other things, and also has various methods attached to the function's object itself.

Which is not to say it isn't a bit dumb, but it is at least more convenient than typing case sensitive jQuery, though even that isn't as $durbrained $as $bloody $_PHP.

It seems cost is just half of usage - or does that change?

Cost is calculated based on a standing daily rate + (units used * unit rate)

I've been wondering about that lately. Linux is, in theory, a much more secure OS than windows. But how many Linux users consist of people like me that spend days at a time running commands and scripts they find down the back of the internet trying to make bits of software work without any real clue of wtf they are actually doing? 

Depending on your level of knowledge, running a command is less of an issue because you can see what you're inputting (and hopefully have some idea what it does, but often not), running scripts though is a different issue since I doubt most people check every line.

Could have a format c: in there somewhere.

It does stuff. With dollar signs. I get dollars from it. Your fragile ego gets a wee boost. Win, win, win.