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@ 2018-09-15T08:21:25Z

<?php

$arr = array (
  0 => 
  array (
    'vehicle' => 'BUS NO.1',
    'trip_name' => 'Trip00011',
    'running_km' => '5000',
  ),
  1 => 
  array (
    'vehicle' => 'BUS NO.2',
    'trip_name' => 'Trip00021',
    'running_km' => '2400',
  ),
  2 => 
  array (
    'vehicle' => 'BUS NO.1',
    'trip_name' => 'Trip00011',
    'running_km' => '0',
  ),
  3 => 
  array (
    'vehicle' => 'BUS NO.2',
    'trip_name' => 'Trip00011',
    'running_km' => '0',
  ),
  4 => 
  array (
    'vehicle' => 'BUS NO.2',
    'trip_name' => 'Trip00021',
    'running_km' => '0',
  ),
);

foreach($arr as $item){
    $key = $item['vehicle'] . $item['trip_name'];
    if(isset($new[$key])){
        if($item['running_km'] > $new[$key]['running_km']) $new[$key] = $item;
    }else{
        $new[$key] = $item;
    }

}
$new = array_values($new);

Var_dump($new);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { [0]=> array(3) { ["vehicle"]=> string(8) "BUS NO.1" ["trip_name"]=> string(9) "Trip00011" ["running_km"]=> string(4) "5000" } [1]=> array(3) { ["vehicle"]=> string(8) "BUS NO.2" ["trip_name"]=> string(9) "Trip00021" ["running_km"]=> string(4) "2400" } [2]=> array(3) { ["vehicle"]=> string(8) "BUS NO.2" ["trip_name"]=> string(9) "Trip00011" ["running_km"]=> string(1) "0" } }

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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