json_encode output formatting for highcharts

Question

I'm using this code to bring a php var into a js function but I can't seem to get the proper formatting (output). I think highcharts needs numbers but it is creating a string even if I use "intval".

series: [{
            name: 'Spyware',
            data: [0, 3, 0, 0, 0]
        }, {
            name: 'Viruses',
            data: [ <?php echo json_encode(intval($virusNum)); ?> , 0, 0, 0, 0] 
        }, {
            name: 'Brute Force Attacks',
            data: [0, 0, 0, 0, 0]
        }, {
            name: 'Host Sweeps',
            data: [0, 0, 0, 0, 0]
        }, {
            name: 'Anonymizer/Proxy Server',
            data: [0, 0, 0, 0, 0]
        }]

Here's where I create the $virusNum variable.

$viruses[$aPos] = intval($freq);
$virusNum = $virusNum + $viruses[$aPos];

JSON is always string, you need to JSON.parse the json_encodeed result. — apokryfos
– apokryfos, Commented Jul 6, 2016 at 21:49

jeffjenx · Accepted Answer · 2016-07-06 21:46:40Z

1

I think you may need to use the $options parameter of the json_encode function in PHP:

json_encode(intval($virusNum), JSON_NUMERIC_CHECK)

JSON_NUMERIC_CHECK (integer)

Encodes numeric strings as numbers. Available since PHP 5.3.3.

answered Jul 6, 2016 at 21:46

jeffjenx

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1 Comment

jeffjenx Over a year ago

What does the code look like after PHP has processed it? Does $virusNum start with a value of 0?

Mike Brant · Accepted Answer · 2016-07-06 21:48:25Z

0

Why json-encode there? This is just an integer value, so there is no need for that.

data: [ <?php echo intval($virusNum); ?> , 0, 0, 0, 0]

edited Jul 6, 2016 at 21:48

answered Jul 6, 2016 at 21:47

Mike Brant

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9 Comments

Marc B Over a year ago

good habit to get into, if nothing else. kind of like writing secure sql queries, even if you know there's no possibility of an injection problem.

Mike Brant Over a year ago

@MarcB I suppose. But I think relying on non-standard, library-specific JSON encoding behaviors, such as how primitives are encoded/decoded when they are not within an appropriate data structure (object or array) - something not covered by the JSON specification - is just as bad.

RandyMCode Over a year ago

This doesn't work either. - Wanted to add this as I just saw the 2 comments appear after saving this comment that I'm a php noob so those comments are greek to me. Thx anyway.

Mike Brant Over a year ago

@RandyMCode what does var_dump($virusNum) produce? Also, this code you show that produces the javascript output is being served up by a PHP page right (i.e. this isn't in some javascript include somewhere)?

RandyMCode Over a year ago

var_dump($virusNum) gives: C:\MAMP\...\threatcharts_datafeed_2016-07-08a.php:71:int 141 - All I need is the 141. I put the "..." in the output, the result was the path to my php file.

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