handling/manipulate/ transform array in PHP

Question

I have this following array :

$myarray = array(
"key_x_1"=>"A",
"key_x_2"=>"B",
"key_x_3"=>"C",
"key_x_4"=>"A",
"key_y_1"=>"10",
"key_y_2"=>"10",
"key_y_3"=>"15",
"key_y_4"=>"20"
);

I want to create a new array like this :

 $mynewarray = array(
"A"=>array(10,20),
"B"=>array(10),
"C"=>array(15)
);

Is it possible ? How can i do this ?

In the second array ($mynewarray), keys are unique values from values from the first array that contain Key_x. The relation between key_x and key_y are the numbers in key name. — prestarocket
– prestarocket, Commented Dec 12, 2011 at 23:19

John Fable · Accepted Answer · 2011-12-12 23:21:07Z

2

I don't know if I understand your logic, but:

$i=1;
while($i<count($myarray)) {
  if(isset($myarray['key_x'.$i]) && isset($myarray['key_y'.$i])) {
    $mynewarray[$myarray['key_x'.$i]][]=$myarray['key_y'.$i];
    ++$i;
  } else {
    break;
  }
}

edited Dec 12, 2011 at 23:21

answered Dec 12, 2011 at 23:16

John Fable

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1 Comment

Jon Egeland Over a year ago

this works, but to follow his code it should be isset($myarray['key_x_'.$i]) && isset($myarray['key_y_'.$i])

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