How to build this kind of Logic using arrays in PHP

Question

I have an array which consists of this set of items

array(3) {
  [0]=>
  array(4) {
    ["Field1"]=>
    string(8) "80000007"
    ["Field2"]=>
    string(16) "O70000006"
    ["Field3"]=>
    string(0) ""
    ["Field4"]=>12345
    string(0) ""
   }
  [1]=>
  array(4) {
    ["Field1"]=>
    string(8) "80000008"
    ["Field2"]=>
    string(16) "O70000007"
    ["Field3"]=>
    string(0) ""
    ["Field4"]=>78965
    string(0) ""
  }
  [2]=>
   array(4) {
    ["Field1"]=>
    string(8) "80000009"
    ["Field2"]=>
    string(16) "H80000006"
    ["Field3"]=>
    string(0) ""
    ["Field4"]=>12345
    string(0) ""
  }
}

Now my question is Iam trying to display only the items once from array or trying to filter the array in such a way if the "Field2" has a value starting with "O" or "H" and their "Field4 " value should be different . If the "Field4" value is same for the each of the row then we dont display that row or array item . For eaxample from the above array we will get 2 items as follows

1)80000007 O70000006 12345
2)80000008 O70000007 78965

//we are not displaying the 3rd Item because The "Field4 " is same . we display only once

 foreach ($resultset  as $key => $value){           
            echo $key."<br>"; ///  outputs 0,1,2
            echo $value['Field2']."<br>"; // outputs O70000006, O70000007, H80000006
}

It's not clear what do you want to reach ?

Hamid
– Hamid

2011-06-30 14:48:46 +00:00
Commented Jun 30, 2011 at 14:48 — Hamid
– Hamid, Commented Jun 30, 2011 at 14:48

Naftali · Accepted Answer · 2011-06-30 16:07:10Z

1

function getField2_removeDupeField4($arr){
     $f4 = array();
     $f2 = array();
     foreach($arr as $array){
          if(in_array($array['Feild4'], $f4){   continue;  }
          $firstChar = substr($array['Feild2'], 0, 1);
          if($firstChar == 'O' || $firstChar == 'H'){
               $f2[] = $array;
               $f4[] = $array['Feild4'];
          }
     }
     return $f2;
}

So to get the array you want:

$new_arr = getField2_removeDupeField4($orig_arr);

edited Jun 30, 2011 at 16:07

answered Jun 30, 2011 at 14:55

Naftali

147k41 gold badges247 silver badges304 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Chriszuma · Accepted Answer · 2011-06-30 17:04:48Z

0

So... you just want some way to skip rows whose Field4 has already been printed?

Set up an array to hold all the previously printed Field4s, and check against that before printing anything. Something like this:

$field4s = array();
foreach ($resultset  as $key => $value){    
            $field4 = $value['Field4'];
            if (($field4[0] == 'O' || $field4[0]=='H') && !in_array($field4 , $field4s) {
                array_push($field4s, $field4);
                echo $field4;
            }
}

edited Jun 30, 2011 at 17:04

answered Jun 30, 2011 at 14:53

Chriszuma

4,60824 silver badges19 bronze badges

1 Comment

Naftali Over a year ago

You forgot to check for the 'O' or 'H'

Collectives™ on Stack Overflow

How to build this kind of Logic using arrays in PHP

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related