[php] Zamiana wartosci i wyswietlenie tylko jednej Opcje

[AndyPSV]

Jak zrobic by jesli _from jest rowne _to badz _to jest rowne _from --- by wybral tylko ten \z ID wyzszym?

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			array (
  0 => 
  array (
    'id' => '8',
    '_from' => '2',
    '_to' => '1',
    'date' => '2018-10-15 15:51:07',
    'message' => 'ccccccxxxxx',
    'read' => '0',
    'feedback' => '0',
    'cnt' => '3',
  ),
  1 => 
  array (
    'id' => '6',
    '_from' => '1',
    '_to' => '2',
    'date' => '2018-10-15 15:47:01',
    'message' => 'zzzzzzz1',
    'read' => '1',
    'feedback' => '0',
    'cnt' => '1',
  ),*/
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[AndyPSV]

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$newArray = '';
foreach ($pm as $item) {
    $uniqueRecordKey = $item['_from'].'-'.$item['_to'];
    $oppositeRecordKey = $item['_to'].'-'.$item['_from'];
 
    //If exists record from the opposite and new ID is greater than previous put
    if (isset($newArray[$oppositeRecordKey])) {
        $oppositeRecordKey[$uniqueRecordKey] = $item;
        continue; //Do not append to the end
    }
 
    $newArray[$uniqueRecordKey] = $item;
}
 
$pm = $newArray;
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