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@ 2021-06-01T18:36:10Z

<?php
$arr = [
    [
        'type'       => 'comment',
        "line_index" => 0,
        "text_b64"   => "OyBjUGFuZWwgZmlyc3Q6ODguMC4xMiAodXBkYXRlX3RpbWUpOjE2MTg1NDYxNDIgQ3BhbmVsOjpab25lRmlsZTo6VkVSU0lPTjoxLjMgaG9zdG5hbWU6cjExOC5sb24yLm15c2VjdXJlY2xvdWRob3N0LmNvbSBs",
    ],
    [
        "line_index" => 1,
        "text_b64"   => "OyBab25lIGZpbGUgZm9yIG9ha3RyZWVkZW50YWxtb3J0aW1lci5jby51aw==",
        "type"       => "comment",
    ],
    [
        "text_b64"   => "JFRUTCAxNDQwMA==",
        "line_index" => 2,
        "type"       => "control",
    ],
    [
        "line_index"  => 3,
        "dname_b64"   => "b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg==",
        "record_type" => "SOA",
        "ttl"         => 30,
        "type"        => "record",
        "data_b64"    => [],
    ],
    [
        "dname_b64"   => "b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg==",
        "line_index"  => 10,
        "record_type" => "NS",
        "ttl"         => 30,
        "type"        => "record",
        "data_b64"    => [],
    ],
    [
        "ttl"         => 30,
        "dname_b64"   => "b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg==",
        "line_index"  => 11,
        "record_type" => "NS",
        "data_b64"    => [],
        "type"        => "record",
    ],
];


$result = array_filter(
    $arr,
    function (array $record) {
        if ($record['type'] == 'record') {
            return true;
        } return false;
    }
);

print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [3] => Array ( [line_index] => 3 [dname_b64] => b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg== [record_type] => SOA [ttl] => 30 [type] => record [data_b64] => Array ( ) ) [4] => Array ( [dname_b64] => b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg== [line_index] => 10 [record_type] => NS [ttl] => 30 [type] => record [data_b64] => Array ( ) ) [5] => Array ( [ttl] => 30 [dname_b64] => b2FrdHJlZWRlbnRhbG1vcnRpbWVyLmNvLnVrLg== [line_index] => 11 [record_type] => NS [data_b64] => Array ( ) [type] => record ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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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