PHP: compare 2 arrays and create new one

Question

I have two arrays, for example the following:

$array1 = array(3,4,3,1);

$array2 = array(2,5,3,0);

each key of the 2 arrays should now be compared and with the smaller value number of each key, I want to create a new array. In this case the new array should be this:

$result = array(2,4,3,0)

How can I do this?

You can do this with a simple for-loop, checking both arrays in parallel — user1299518
– user1299518, Commented May 27, 2014 at 18:37

Tom Fenech · Accepted Answer · 2014-05-27 18:50:32Z

2

You can use array_map like this:

$array1 = array(3,4,3,1);    
$array2 = array(2,5,3,0);

$result = array_map(min, $array1, $array2);
print_r($result);

array_map applies a function (in this case min) to each element of an array and returns the resulting array. If more than one array is passed to array_map, the corresponding elements from each array are used as arguments to the function.

Output:

Array ( [0] => 2 [1] => 4 [2] => 3 [3] => 0 )

edited May 27, 2014 at 18:50

answered May 27, 2014 at 18:38

Tom Fenech

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Comments

ebo · Accepted Answer · 2014-05-27 18:38:18Z

2

array_map is your friend:

$array1 = array(3,4,3,1);
$array2 = array(2,5,3,0);

$array3 = array_map(min,$array1,$array2);

print_r($array3);

gives:

Array
(
    [0] => 2
    [1] => 4
    [2] => 3
    [3] => 0
)

answered May 27, 2014 at 18:38

ebo

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Comments

mkr · Accepted Answer · 2014-05-27 18:47:34Z

0

Don't know if array_push is the most elegant solution, but the result seems to be what you're looking for.

$array1 = array(3,4,3,1);
$array2 = array(2,5,3,0);
$result = array();
$len = count($array1);

for($i = 0; $i < $len; $i++) {
    $array1[$i] < $array2[$i] ? array_push($result, $array1[$i]) : array_push($result,            $array2[$i]);
}
print_r($result);

Result:

Array
(
    [0] => 2
    [1] => 4
    [2] => 3
    [3] => 0
)

answered May 27, 2014 at 18:47

mkr

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Comments

GôTô · Accepted Answer · 2014-05-27 19:04:58Z

0

You can use this as a concept

$array3 = array(); 
for($a = 0; a < count($array1); $a++)
{
    if($array1[$a]<$array2[$a])
        $array3[$a]=$array1[$a];
    else
        $array3[$a]=$array2[$a];
}

edited May 27, 2014 at 19:04

GôTô

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answered May 27, 2014 at 18:39

A.B

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