Get Lower Number In each array value in PHP

Question

i have array here

"data": [
 {
    "ohp_id": "40",
    "parent_ohp_id": "",
    "level": "1"
  },
 {
    "ohp_id": "42",
    "parent_ohp_id": "",
    "level": "2"
  },
  {
    "ohp_id": "45",
    "parent_ohp_id": "",
    "level": "5"
  },
  {
    "ohp_id": "46",
    "parent_ohp_id": "",
    "level": "5"
  },
  {
    "ohp_id": "47",
    "parent_ohp_id": "",
    "level": "5"
  }

I need to compare each other array value and get lower number of level then get ohp_id of the lower level from each of them in PHP code. Here what i need to be:

"data": [
 {
    "ohp_id": "40",
    "parent_ohp_id": "",
    "level": "1"
  },
 {
    "ohp_id": "42",
    "parent_ohp_id": "40",
    "level": "2"
  },
  {
    "ohp_id": "45",
    "parent_ohp_id": "42"
    "level": "5"
  },
  {
    "ohp_id": "46",
    "parent_ohp_id": "42",
    "level": "5"
  },
  {
    "ohp_id": "47",
    "parent_ohp_id": "42",
    "level": "5"
  }

I know it need looping, tried:

for ($i = 0; $i < count($arrPosition); $i++) {

    $hasPosition->loadHas($orgId, $arrPosition[$i]);

    if (!$hasPosition->id) {
        $hasPosition->level=$arrLevel[$i];
        $hasPosition->parent_ohp_id=<get ohp id from lower level>;
        $hasPosition->ohp_id=$ohp_id;
        $hasPosition->save();
    } else {
        if ($hasPosition->level!=$arrLevel[$i]) 
            $hasPosition->level=$arrLevel[$i];
        if ($hasPosition->seat!=$arrSeat[$i])
            $hasPosition->seat=$arrSeat[$i];

        $hasPosition->save(true);
    }
}

But i don't know how to get ohp_id from lower level. I tried from @urmaul answer:

$min = array_reduce($data, function($min, $ohp) {
    return (!$min || $ohp['level'] < $min['level']) ? $ohp : $min;
});

but it just show for one array key

Array
(
    [ohp_id] => 81
    [parent_ohp_id] =>
    [level] => 2
)

Help me, thanks

Wow your formatting is... weird :P

PeeHaa
– PeeHaa

2016-07-20 08:27:08 +00:00
Commented Jul 20, 2016 at 8:27 — PeeHaa
– PeeHaa, Commented Jul 20, 2016 at 8:27

eol · Accepted Answer · 2016-07-20 09:45:37Z

Assuming that the array is already sorted by the ohp_id you can easily do it like this:

<?php

class OHP {
public $ohp_id;
public $parent_ohp_id;
public $level;
    public function __construct($ohpId,$parentId,$level){
        $this->ohp_id = $ohpId;
        $this->parent_ohp_id = $parentId;
        $this->level = $level;
    }
}

function sortByParentId(&$dataArr){
        $lastParentId = null;       
        for($j=0; $j + 1 < count($dataArr); $j++){              
            if($dataArr[$j+1]->level > $dataArr[$j]->level){
                $lastParentId = $dataArr[$j]->ohp_id;
            }
            $dataArr[$j+1]->parent_ohp_id = $lastParentId;
        }       
}



$data[] = new OHP(40,null,1); 
$data[] = new OHP(42,null,2); 
$data[] = new OHP(45,null,5); 
$data[] = new OHP(46,null,5); 
$data[] = new OHP(47,null,5); 


sortByParentId($data);


foreach($data as $currObj){
    print_r($currObj);
    echo "<br>";
}
?>

Output:

OHP Object ( [ohp_id] => 40 [parent_ohp_id] => [level] => 1 ) 
OHP Object ( [ohp_id] => 42 [parent_ohp_id] => 40 [level] => 2 ) 
OHP Object ( [ohp_id] => 45 [parent_ohp_id] => 42 [level] => 5 ) 
OHP Object ( [ohp_id] => 46 [parent_ohp_id] => 42 [level] => 5 ) 
OHP Object ( [ohp_id] => 47 [parent_ohp_id] => 42 [level] => 5 )

urmaul · Accepted Answer · 2016-07-20 10:00:01Z

1

Here's how you can get minimal object of one array:

$min = array_reduce($data, function($min, $ohp) {
    return (!$min || $ohp['level'] < $min['level']) ? $ohp : $min;
});

answered Jul 20, 2016 at 10:00

urmaul

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2 Comments

Nike Yulistia Angreni Over a year ago

I'm really sorry,, but it just show one array key :(

urmaul Over a year ago

It should return one set with minimal level so you can get it's id and stuff.

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