PHP array remove by value inside array

Question

There is an array of airports that gets filled with a user list.

    $airport_array[$airport_row['airportICAO']]    = array(
        'airportName' => $airport_row['airportName'],
        'airportCity' => $airport_row['airportCity'],
        'airportLat' => $airport_row['airportLat'],
        'airportLong' => $airport_row['airportLong'],
        'airportUserCount' => 0,
        'airportUserList' => array()
    );

After filling, "airportUserCount" will either be 0 or higher than 1. Now, I want to remove all airports from the array where airportUserCount is set to 0. What is the most performant way to do it? I thought about a foreach loop but I fear it's not necessarily the most elegant solution.

use array_filter

u_mulder
– u_mulder

2016-07-20 09:01:08 +00:00
Commented Jul 20, 2016 at 9:01 — u_mulder
– u_mulder, Commented Jul 20, 2016 at 9:01

Drone · Accepted Answer · 2016-07-20 09:01:51Z

2

Use this code

 foreach($airport_array as $key=>$value){
      if($value['airportUserCount']==0){
      unset($airport_array[$key]);
      }
 }

Here is live demo : https://eval.in/608462

answered Jul 20, 2016 at 9:01

Drone

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1 Comment

Lars Over a year ago

Thanks to all of you :)

u_mulder · Accepted Answer · 2016-07-20 09:02:49Z

2

$new_airports = array_filter(
    $old_airports,
    function($a) { return 0 < $a['airportUserCount']; }
);

answered Jul 20, 2016 at 9:02

u_mulder

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2 Comments

Lars Over a year ago

Thanks to all of you :)

Narendrasingh Sisodia Over a year ago

Can be simply {return $v['airportUserCount'];})

Ivan · Accepted Answer · 2016-07-20 09:36:56Z

2

foreach loop, check for the ones that have the Count == 0 then remove them from the array.

$result = array();

foreach ($airport_array[$airport_row['airportICAO']] as $arrays)
{
    if($arrays['airportUserCount'] == 0) {
        array_push($result, $arrays);
    }

}

edited Jul 20, 2016 at 9:36

answered Jul 20, 2016 at 9:01

Ivan

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1 Comment

Lars Over a year ago

Thanks to all of you :)

jitendrapurohit · Accepted Answer · 2016-07-20 09:03:56Z

1

Use array_filter:

$a = array_filter($a, function($v) { return $v['airportUserCount'] != 0; });

Demo :- https://eval.in/608464

answered Jul 20, 2016 at 9:03

jitendrapurohit

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Comments

scottevans93 · Accepted Answer · 2016-07-20 09:05:02Z

1

array_filter allows you to iterate through an array while using a callback function to check values.

function filterAirports($airports){
    return ($airport['airportUserCount'] == 0) ? true : false ;
}

print_r(array_filter($airport_array, "filterAirports"));

answered Jul 20, 2016 at 9:05

scottevans93

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