how to enter variables from a url in a php array

Question

a newbie question!

I have set up some code to create an image with this url:

www.mywebpage.php?wc1=99&wc2=6&wc3=23

In a php page want to use the wc1, wc2 and wc3 variables from the url as inputs to a bar chart graphic

the code on the receiving webpage includes this line:

$datay=array($_REQUEST['wc1'], $_REQUEST['wc2'], $_REQUEST['wc3']);

and using the datay array I get a nice bar chart with three bars.

My problem is I want to create urls with any number of wc? variables, and then create an array with any number of bars in the resulting bar chart. The numbero f bars should be dynamically set by some other real-time process.

So I realise I need to embed this line of code:

$datay=array($_REQUEST['wc1'], $_REQUEST['wc2'], $_REQUEST['wc3']);

in a loop and add in variablles to the array one by one until they are all added (whatever number there are).

However, I am stuck at the first hurdle as I do not know how to add a variable to the array.

This code does not work:

$firstBit = $_REQUEST['wc1'];
$datay=array(firstBit, $_REQUEST['wc2'], $_REQUEST['wc3']);

John Conde · Accepted Answer · 2012-06-26 14:17:57Z

1

You're just missing the $ from your variable name

 $datay=array($firstBit, $_REQUEST['wc2'], $_REQUEST['wc3']);

answered Jun 26, 2012 at 14:17

John Conde

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Pete · Accepted Answer · 2012-06-26 14:22:02Z

1

foreach($_GET as $key=>$value){
    echo $key;
    echo "<br/>";
    echo $value;
    echo "<br/>";
}

You'll soon understand

answered Jun 26, 2012 at 14:22

Pete

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Fenton · Accepted Answer · 2012-06-26 14:21:54Z

0

In your request, pass the values thus:

www.mywebpage.php?wc[]=99&wc[]=6&wc[]=23

And then you have an array out of the box...

$myArray = $_REQUEST['wc'];

answered Jun 26, 2012 at 14:21

Fenton

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1 Comment

Fenton Over a year ago

@Dean it also means you don't need to change the code when you add the forth and fifth value and so on.

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