How to delete an array within an array by a specific value?

Question

PHP

I have an array like this:

$results = [ 
         ['order_id'  =>  'first',  'id'=> 1],
         ['order_id'  =>  'second',   'id'=> 4],
         ['order_id'  =>  'third',   'id'=> 7]
    ];

//Прогоняю в цикле с условием, что будет удален подмассив в котором 'id' равен 4.

foreach ($results as $item){
       foreach ($item as $value){
        }
        if ($item['id'] == 4)
        unset($item);
}
print_r ($results);

However, after all that I did, the array remains unchanged.
Even though ['order_id' => 'second', 'id'=> 4]he had to leave.

Answer 1

a normal answer to this question
, otherwise right now they will come running with links, or out - filters with a subvert.

foreach ($results as $key => $item) {
    if ($item['id'] === 4) {
        unset($results[$key]);
    }
}

Answer 2

Using array_filter:

<?php
$results = [
  ['order_id' => 'first', 'id'=>1],
  ['order_id' => 'second', 'id'=>4],
  ['order_id' => 'third', 'id'=>7]
];

$filtered = array_filter(
  $results,
  function($el) {
    return $el['id'] != 4;
  }
);

var_export($filtered);

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