How to Sort JSON Products with PHP [closed]

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How would I sort these two products by say id:17 value:### ?

{"id":"16","value":"L-AOC000"},
{"id":"17","value":"6.00"},
{"id":"18","value":"10.00"},
{"id":"19","value":"7.52"},
{"id":"20","value":"4.75"},
{"id":"21","value":"3.50&quo开发者_运维知识库t;}

{"id":"16","value":"L-AOC001"},
{"id":"17","value":"7.00"},
{"id":"18","value":"11.00"},
{"id":"19","value":"6.52"},
{"id":"20","value":"5.75"},
{"id":"21","value":"4.50"}

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You can convert the json object to a php array with json_decode(). From there, you can use any of the array sorting functions native to php.

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Well first, you'd want to conver the Json into a php type.

$data = json_decode($the_json_string);

Then what you have is really an array of objects.

You can use usort() to sort it out (http://au2.php.net/usort) by property.

Seems like you want to test by id first then by value...

function sort_by_id_then_value($a, $b)
{
    if ($a->id == $b->id) {
        if ($a->value == $b->value) {
            return 0;
        return ($a->value < $b->value ) ? -1 : 1;
    }
    return ($a->id < $b->id) ? -1 : 1;
}

usort($data, "sort_by_id_then_value");