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@ 2014-11-01T23:52:42Z

<?php
        $movies = array (
         "horror"=>array (
         "Paranormal Activity"=> array (
         "Katie Featherston",
         "Kathryn Newton"
         ),
         "The Ring"=> array (
         "Naomi Watts",
         "Brian Cox"
         ),
         "Sleepy Hollow"=> array(
         "Johhny Depp",
         "Christina Ricci"
         )
         ),
         "action" => array (
         "The Tourist"=> array (
         "Johnny Depp",
         "Angelina Jolie"
         ),
         "Public Enemies"=> array (
         "Johnny Depp", "Christian Bale"
         ),
         "The Dark Knight Rises"=> array (
         "Christian Bale",
         "Tom Hardy"
         ),
         "Salt"=> array (
         "Angelina Jolie"
         )
         ),
         "thriller"=> array (
         "Inception"=> array(
         "Leornardio Dicaprio",
         "Tom Hardy"
         ),
         "Changeling" => array(
         "Angelina Jolie"
         ),
         "The Game"=> array(
         "Michael Douglas",
         "Sean Penn"
         )
         )
        );

        $keys = array_keys($movies);
        foreach ($keys as $genre) {
                      echo $genre,"\n";
        }

Output for git.master, git.master_jit, rfc.property-hooks: horror action thriller

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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