How to store a function result in an array for JSON encoding?

Question

I have:

 if ( isset( $_POST["test"] ) ) { 

$html1 = $object->htmlmarkup1();
$html2 = $object->htmlmarkup2();
$json = array("html1" => $html1, "html2" => $html2);

die(json_encode($json));
}

The functions echo html markup based on some calculations from the "test" POST data. The functions are using echo instead of return because I am using these functions elsewhere and the format of my code is easier to just echo the results of the functions rather than return the result first.

I have tested this without using functions by putting "test1" and "test2" in the two array elements and the resulting json decodes and displays "test1" and "test2" correctly in my test page.

possible duplicate of capturing echo into a variable

mario
– mario

2013-06-13 23:27:00 +00:00
Commented Jun 13, 2013 at 23:27 — mario
– mario, Commented Jun 13, 2013 at 23:27

Lepidosteus · Accepted Answer · 2013-06-13 23:25:22Z

3

You can use output buffering. This allows you to save the output in a buffer instead of sending it to the client, and then getting it back (eg to store it in a variable).

See ob_start(), ob_get_clean() and all the other associated functions.

// from now on, output is not sent to the client but saved in a buffer
ob_start(); 
$object->htmlmarkup1();
// get the content of the buffer into $html1 and turn off output buffering
$html1 = ob_get_clean(); 

ob_start();
$object->htmlmarkup2();
$html2 = ob_get_clean();

$json = array("html1" => $html1, "html2" => $html2);

answered Jun 13, 2013 at 23:25

Lepidosteus

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1 Comment

user1166981 Over a year ago

good one, it's funny how languages almost always have features which solve problems directly but you don't use them until you come across the problem yourself. I will accept this answer once the time limit.

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