Sort multidimensional array of objects

Question

I have seen so many example at stackoverflow to sort multidimensional array of object like

But none them could help me to sort my multidimensional array of objects given below

I need to sort the above array on the basis of key amount in descending order. But the problem is amount key exist under two different parent keys "zestimate" and "rentzestimate".

i have tried the following function but it did not work:

public function my_comparison($a, $b) {
    if ($a->amount == $b->amount) {
            return 0;
    }
    return ($a->amount < $b->amount) ? -1 : 1;
}

Any help?

Thanks in advance

Could you clarify please: you want to sort an array response->results->result? — Alexander Guz
– Alexander Guz, Commented Dec 1, 2014 at 12:11
Please provide an example of your result based upon the supplied input example. — RichardBernards
– RichardBernards, Commented Dec 1, 2014 at 12:12
The stated problem does not have a general solution. You should decide how you want to sort elements with contradicting amounts (say, ze=>1,rze=>10 vs ze=>5,rze=>5.) — Aleksei Matiushkin
– Aleksei Matiushkin, Commented Dec 1, 2014 at 12:12
Yes, i want to sort response->results->result. I just have given example of Zeroth object of array and rest at are at the end. — Neeraj
– Neeraj, Commented Dec 1, 2014 at 12:14
Then, as @mudasobwa noticed, you have to decide how both amount fields influence the final result, i.e. the sum of these fields is used as a value for comparing two elements in the result array. Do you know this criteria? — Alexander Guz
– Alexander Guz, Commented Dec 1, 2014 at 12:17

Alexander Guz · Accepted Answer · 2014-12-01 12:50:49Z

2

response->results->result is an array of SimpleXMLElement objects. You want to sort the array based on the inner zestimate->amount property of the element in descending order.

You have to write a comparison function that accepts SimpleXMLElement objects and, because you want a descending order, returns 1 if the zestimate->amount property of the first object is less than that of the second, -1 if it's greater and 0 if it's equal:

public function my_comparison(SimpleXMLElement $a, SimpleXMLElement $b) {
    if ($a->zestimate->amount == $b->zestimate->amount) {
        return 0;
    }
    return ($a->zestimate->amount < $b->zestimate->amount) ? 1 : -1; // note the signs
}

edited Dec 1, 2014 at 12:50

answered Dec 1, 2014 at 12:20

Alexander Guz

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2 Comments

Neeraj Over a year ago

how would it sort the entire array in desecding order on the basis of zestimate->amount

Alexander Guz Over a year ago

I updated my answer to clarify it. Pay special attention to the signs of the result of my_comparison function.

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