Accessing Matrix Array Value in Json_encoded Array

Question

I have a php array that I assigned to a javascript variable with json_encode. The php array is numerical not associative.

Example: simpleArray[5][7]=1.50. I need to be able to access the 1.50 after the array has been json_encoded based on the index values.

PHP:

$simpleArray= [];   

foreach($childProducts as $child) { //cycle through simple products to find applicable
    $simpleArray[$child->getVendor()][$child->getColor()] = $child->getPrice();
    var_dump ($simpleArray);
}

Javascript:

var simpleArray = <?=json_encode($simpleArray)?>;
//..lots of unrelated code
for(var i=0; i < IDs.length; i++)
{   
    console.log(simpleArray);//see the picture of me below
    var colorSelected = $j("#attribute92 option:selected").val(); //integer value

    $j('.details'+data[i].vendor_id).append('<li class="priceBlock">$'+simpleArray[i][colorSelected]+'</li>');
}

Console.log(simpleArray):

enter image description here

What's IDs and data? Your simpleArray[i][colorSelected] is right, provided i (taken from IDs.length) is a value in the first dimension. — Matt
– Matt, Commented May 23, 2013 at 20:20
"need to access"? Why not use the original array? $simpleArray[5][7]. json is a data encapsulation/transport format. it's nothing something you should EVER be attempting to "access". — Marc B
– Marc B, Commented May 23, 2013 at 20:26
I need to access the php array within the javascript because it's dynamic on the page. I just took a clip of this code. Before it is a ajax request, hence the data, but it shouldn't be applicable to this issue. — CaitlinHavener
– CaitlinHavener, Commented May 23, 2013 at 20:30
Your object doesn't have keys at 0 1 and 2, you'll get an error on simpleArray[i][colorSelected] because i first equals 0. — user400654
– user400654, Commented May 23, 2013 at 20:34

Mike Brant · Accepted Answer · 2013-05-24 15:32:48Z

0

Here you are likely trying to access values that don't exist in your object:

simpleArray[i][colorSelected]

Based on your for loop definition, you can have i values of 0, 1, 2 which don't exist in the object shown (which has properties at keys: 3,4,5). Also your for loop has no relation at all to the number of items in your object, which I am not sure is intended.

Also, colorSelected derives it's value from a call to val() which returns a string you you probably want to change the line where it is defined to:

var colorSelected = parseInt($j("#attribute92 option:selected").val());

This will make it an integer value.

edited May 24, 2013 at 15:32

answered May 23, 2013 at 20:29

Mike Brant

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1 Comment

Matt Over a year ago

Object keys are toString()'d anyway, so parseInt or no-parseInt should make a difference (jsfiddle.net/SEaFy).

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