[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?

[PHP] pobierz, plaintext 
			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',
  ),*/
[PHP] pobierz, plaintext 

[werdan]

Poniżej działający przykład:

[PHP] pobierz, plaintext 
 
<?php
 
 
$a = [
    [
    'id' => '8',
    '_from' => '2',
    '_to' => '2',
    'date' => '2018-10-15 15:51:07',
    'message' => 'ccccccxxxxx',
    'read' => '0',
    'feedback' => '0',
    'cnt' => '3',
    ],
    [
    'id' => '6',
    '_from' => '2',
    '_to' => '2',
    'date' => '2018-10-15 15:47:01',
    'message' => 'zzzzzzz1',
    'read' => '1',
    'feedback' => '0',
    'cnt' => '1',
    ]
];
 
 
$b = array_filter($a, function($row){
   return ($row['_from'] == $row['_to']); 
});    
 
print_r($b);    
 
function sort_arr($item_1, $item_2)
{
  return $item_2['time'] - $item_1['time'];
}
 
usort($b, function($x, $y){
 
     return $y['id'] - $x['id'];
});
 
$max = null;
if(count($b)){
    $max = reset($b);   
}
 
print_r($max); 
 
 
[PHP] pobierz, plaintext 

[AndyPSV]

Nie dziala mi ten przyklad

tu jest przyklad danych z $pm;

[PHP] pobierz, plaintext 
array (
  0 => 
  array (
    'id' => '8',
    '_from' => '2',
    '_to' => '1',
    'date' => '2018-10-15 15:51:07',
    'message' => 'ccccccxxxxx',
    'read' => '1',
    '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',
  ),
  2 => 
  array (
    'id' => '4',
    '_from' => '3',
    '_to' => '1',
    'date' => '2018-10-15 15:20:47',
    'message' => 'aaaaaaaaaa1e2642d888b14f0df948682041e48fa31391081110-480-272-301....flv
1e2642d888b14f0df948682041e48fa31391081110-480-272-301-h264.flv play
energy 2000 stare ale nadal jare-).mp3
lil peep - benz truck (prod. smokeasac).mp3
NAJWAZNIEJSZA,+websites.2013-05-31vPACK-ALL.rar
httpd-WEBPAGES,2014-11-24v1-PASS.PROTECTED.rar
Gang Albanii-Narkotykowy odlot (Instrumental).mp3
Gang Albanii-Blachary (Instrumental).mp3
1e2642d888b14f0df948682041e48fa31391081110-480-272-301....flv
1e2642d888b14f0df948682041e48fa31391081110-480-272-301-h264.flv play
energy 2000 stare ale nadal jare-).mp3
lil peep - benz truck (prod. smokeasac).mp3
NAJWAZNIEJSZA,+websites.2013-05-31vPACK-ALL.rar
httpd-WEBPAGES,2014-11-24v1-PASS.PROTECTED.rar
Gang Albanii-Narkotykowy odlot (Instrumental).mp3
Gang Albanii-Blachary (Instrumental).mp3
1e2642d888b14f0df948682041e48fa31391081110-480-272-301....flv
1e2642d888b14f0df948682041e48fa31391081110-480-272-301-h264.flv play
energy 2000 stare ale nadal jare-).mp3
lil peep - benz truck (prod. smokeasac).mp3
NAJWAZNIEJSZA,+websites.2013-05-31vPACK-ALL.rar
httpd-WEBPAGES,2014-11-24v1-PASS.PROTECTED.rar
Gang Albanii-Narkotykowy odlot (Instrumental).mp3
Gang Albanii-Blachary (Instrumental).mp3
1e2642d888b14f0df948682041e48fa31391081110-480-272-301....flv
1e2642d888b14f0df948682041e48fa31391081110-480-272-301-h264.flv play
energy 2000 stare ale nadal jare-).mp3
lil peep - benz truck (prod. smokeasac).mp3
NAJWAZNIEJSZA,+websites.2013-05-31vPACK-ALL.rar
httpd-WEBPAGES,2014-11-24v1-PASS.PROTECTED.rar
Gang Albanii-Narkotykowy odlot (Instrumental).mp3
Gang Albanii-Blachary (Instrumental).mp3',
    'read' => '1',
    'feedback' => '0',
    'cnt' => 7,
  ),
)
[PHP] pobierz, plaintext 

[AndyPSV]

Chodzi o to by OUTPUT byl taki:

[PHP] pobierz, plaintext 
			array (
  0 => 
  array (
    'id' => '8',
    '_from' => '2',
    '_to' => '1',
    'date' => '2018-10-15 15:51:07',
    'message' => 'ccccccxxxxx',
    'read' => '0',
    'feedback' => '0',
    'cnt' => '3',
  ),
[PHP] pobierz, plaintext 

z wysszym ID jeden klucz co jest taki sam _from jak _to

[AndyPSV]

[PHP] pobierz, plaintext 
$newArray = '';
foreach ($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;
[PHP] pobierz, plaintext