Array sorting by values descending and sort index by ascending in php

Question

I have an array pr($site_name_with_value) looks like this. This is the result of two combine_array.

Array(
    [Ashuganj PDB] => 720
    [Bagherhat PGCB] => 720
    [Banani_CO] => 720
    [Barapukuria PGCB] => 784
    [Barishal PGCB] => 780
    [Benapole_CO] => 752
    [Bogura RO] => 776
    [Bogura_CO(IS)] => 784 
)

I have tried this to expected output.

$site_name_with_value_order = arsort($site_name_with_value); 
foreach ($site_name_with_value_order as $key => $val) {
    echo "$key = $val\n";
}

It returns an error message Invalid argument supplied for foreach()

First I want to sort them by value descending order. Second if the value is the same then order index by ascending.

I want to get output looks like this. But I don't know how to gain my expected output.

Array(
    [Bogura_CO(IS)] => 784
    [Barapukuria PGCB] => 784
    [Barishal PGCB] => 780
    [Bogura RO] => 776
    [Benapole_CO] => 752 
    [Ashuganj PDB] => 720
    [Bagherhat PGCB] => 720
    [Banani_CO] => 720   
)

Those arrays aren't valid. You can't have the same key multiple times. Keys are unique. — M. Eriksson
– M. Eriksson, Commented Oct 6, 2018 at 9:00
Also, as stated in the manual, arsort() doesn't return the sorted array. It returns a boolean. It modifies the original array (uses it as a reference). So you're actually passing a boolean to foreach() which is invalid. — M. Eriksson
– M. Eriksson, Commented Oct 6, 2018 at 9:03

A l w a y s S u n n y · Accepted Answer · 2020-10-15 19:27:32Z

2

First of all, you've created an array with duplicate key which is not a valid way. So when you try to sort the array by value with arsort()- Sort an array in reverse order and maintain index association, but it will return different results for different php version. See the DEMO

$array = array(
   
    'Ash' => 776,
    'Bag' => 720,
    'Ban' => 720,
    'Bar' => 776,
    'Bar' => 780,
    'Ben' => 752,
    'Bog' => 720,
    'Bog' => 780,
    'Bue' => 776,  
);
arsort($array);
print_r($array);

edited Oct 15, 2020 at 19:27

answered Oct 6, 2018 at 9:07

A l w a y s S u n n y

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1 Comment

A.A Noman Over a year ago

Good advice for me. And first of all my array already arranged in ascending order.

Vinia · Accepted Answer · 2018-10-06 09:14:40Z

1

There's no need to assign the

arsort($site_name_with_value);

in another variable because it will only return to 1. So just loop the

$site_name_with_value

instead.

answered Oct 6, 2018 at 9:14

Vinia

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