PHP Split array of objects into multiple arrays by key=>value

Question

I would like to split an array of objects into multiple arrays by key=>value, but I couldn't figure it out how.

I have an array like this:

Array => (
 [0]=>stdClass Object(
  [id]=>1
  [title]=> Title1
  [content]=>Content1
  [cat]=>Cat1
  [date]=>20140910
 )
 [1]=>stdClass Object(
  [id]=>2
  [title]=> Title2
  [content]=>Content2
  [cat]=>Cat2
  [date]=>20140910
 )
 [2]=>stdClass Object(
  [id]=>3
  [title]=> Title3
  [content]=>Content3
  [cat]=>Cat1
  [date]=>20140910
 )
)

and I would like to split this by "cat"=>"value" and create an array like this

Array => (
 [Cat1] => Array(
  [0] => Array(
   [id]=>1
   [title]=> Title1
   [content]=>Content1
   [cat]=>Cat1
   [date]=>20140910
  )
  [1] => Array(
   [id]=>3
   [title]=> Title3
   [content]=>Content3
   [cat]=>Cat3
   [date]=>20140910
  )
 )
 [Cat2] => Array(
  [0] => Array(
   [id]=>2
   [title]=> Title2
   [content]=>Content2
   [cat]=>Cat2
   [date]=>20140910
  )
 )
)

So this is what I'm trying to do but I couldn't.

MH2K9 · Accepted Answer · 2014-09-21 17:39:04Z

5

You can use casting. Use (array) before object. An example here..

$newArr = array();
foreach($obj as $val){
    $newArr[$val->cat][] = (array)$val;
}

edited Sep 21, 2014 at 17:39

answered Sep 21, 2014 at 17:33

MH2K9

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1 Comment

Laci K Over a year ago

Thanks this worekd! I didn't thought that the solution would be so simple. I tend to over think things :)

olegkhuss · Accepted Answer · 2014-09-21 17:32:41Z

2

$array = array();
foreach ($objects as $k => $v) {
 if (!isset($array[$v->cat])) {
   $array[$v->cat] = array();
 } 
 $array[$v->cat][] = (array) $v;
}

answered Sep 21, 2014 at 17:32

olegkhuss

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1 Comment

deceze Over a year ago

No need for !isset($array[$v->cat]) .., just $array[$v->cat][] = .. will do just fine.

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