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@ 2019-07-18T11:22:34Z

<?php

$books_sorted = array(
     0 => array(
        "title" => "In Search of Lost Time"
     ),
     1 => array(
        "title" => "Don Quixote"
     ),
     2 => array(
        "title" => "The Great Gatsby"
     )
);

$books_available = array(
      0 => array(
         "title" => "Moby Dick"
      ),
      1 => array(
         "title" => "In Search of Lost Time"
      ),
      2 => array(
         "title" => "The Great Gatsby"
      ),
      3 => array(
         "title" => "War and Peace"
      )
);

$sorted_titles = array_column($books_sorted, 'title');
$available_titles = array_column($books_available, 'title');

$third_array = array_merge(
    array_filter($books_sorted, function($e) use ($available_titles) {
        return in_array($e['title'], $available_titles);
    }),
    array_filter($books_available, function($e) use ($sorted_titles) {
        return !in_array($e['title'], $sorted_titles);
    })
);

print_r($third_array);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [title] => In Search of Lost Time ) [1] => Array ( [title] => The Great Gatsby ) [2] => Array ( [title] => Moby Dick ) [3] => Array ( [title] => War and Peace ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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