PHP multidimensional array to single array sort by value

Question

I have one multidimensional array and this array I have to convert into single array with sort. I tried to use call_user_func_array('array_merge', $ranges); this function. After using this function get single array. When I use sort() function on single array then show output 1.

My array

    Array
(
    [range1] => Array
        (
            [0] => 1113
            [1] => 2224 
        )

    [range2] => Array
        (
            [0] =>  500
            [1] => 1112
        )

    [range3] => Array
        (
            [0] => 2225
            [1] => 4446
        )
)

Use call_user_func_array('array_merge', $ranges); output

    Array
(
    [0] => 1113
    [1] => 2224 
    [2] =>  500
    [3] => 1112
    [4] => 2225
    [5] => 4446
)

Now I am use sort() function then show 1. Why this happen?

Rajdeep Paul · Accepted Answer · 2016-12-18 20:29:10Z

2

You're almost there. In sort() function, array is passed by reference, and return true on success and false on failure. So you should apply sort() function on the flattened array like this:

$array = call_user_func_array('array_merge', $ranges);
sort($array);

// display sorted array
var_dump($array);

Here's the reference:

http://php.net/manual/en/function.sort.php

answered Dec 18, 2016 at 20:29

Rajdeep Paul

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Comments

rafwlaz · Accepted Answer · 2016-12-18 20:13:50Z

1

sort() function work by reference and returning true or false so no need to asign result to variable because source variable is changed by reference

answered Dec 18, 2016 at 20:13

rafwlaz

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2 Comments

sandip kakade Over a year ago

so how can i sort from lowest value to highest value

rafwlaz Over a year ago

@dhanashri sorted array is the same variable as this one provided to sort function.

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