Extract negative and positive value from an array to two separate arrays,

Question

I need to divide an array into two arrays.

One array will contain all positive values (and zeros), the other all negative values.

Example array:

$ts = [7,-10,13,8,0,4,-7.2,-12,-3.7,3.5,-9.6,6.5,-1.7,-6.2,7];

Negatives result array:

[-10,-7.2,-12,-3.7,-9.6,-1.7,-6.2];

Non-negatives result array:

[7,13,8,0,4,3.5,6.5,7];

Answer 1

Without using any array functions..

Pretty straightforward. Just loop through the array and check if the number is less than 0, if so , push it in the negative array else push it in the positive array.

<?php
$ts=array(7,-10,13,8,4,-7.2,-12,-3.7,3.5,-9.6,6.5,-1.7,-6.2,7);
$pos_arr=array(); $neg_arr=array();
foreach($ts as $val)
{
    ($val<0) ?  $neg_arr[]=$val : $pos_arr[]=$val;
}
print_r($pos_arr);
print_r($neg_arr);

OUTPUT :

Array
(
    [0] => 7
    [1] => 13
    [2] => 8
    [3] => 4
    [4] => 3.5
    [5] => 6.5
    [6] => 7
)
Array
(
    [0] => -10
    [1] => -7.2
    [2] => -12
    [3] => -3.7
    [4] => -9.6
    [5] => -1.7
    [6] => -6.2
)

Answer 2

You can use array_filter function,

$positive = array_filter($ts, function ($v) {
  return $v > 0;
});

$negative = array_filter($ts, function ($v) {
  return $v < 0;
});

Note: This will skip values with 0, or you can just change condition to >=0 in positive numbers filter to considered in positive group.

DEMO.