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@ 2023-09-21T21:34:31Z

<?php

$data = [
    'blue'   => 43,
    'red'    => 87,
    'purple' => 130,
    'green'  => 12,
    'yellow' => 31
];

$bad_keys1 = [
    'purple',
    'yellow',
];
$bad_keys2 = [
    'green',
];

function remove_blacklisted_keys(array $haystack, array ...$blacklists) {
    return array_diff_key($haystack, array_flip(array_merge(...$blacklists)));
}

function remove_blacklisted_keys_preflipped(array $haystack, array ...$blacklists) {
    return array_diff_key($haystack, ...$blacklists);
}


var_export(remove_blacklisted_keys($data, $bad_keys1));
echo "\n";
var_export(remove_blacklisted_keys($data, $bad_keys1, $bad_keys2));
echo "\n";
var_export(remove_blacklisted_keys_preflipped($data, array_flip($bad_keys1)));
echo "\n";
var_export(remove_blacklisted_keys_preflipped($data, array_flip($bad_keys1), array_flip($bad_keys2)));

Output for rfc.property-hooks: array ( 'blue' => 43, 'red' => 87, 'green' => 12, ) array ( 'blue' => 43, 'red' => 87, ) array ( 'blue' => 43, 'red' => 87, 'green' => 12, ) array ( 'blue' => 43, 'red' => 87, )
Output for git.master, git.master_jit: /bin/php-git-master: error while loading shared libraries: libonig.so.5: cannot open shared object file: No such file or directory
Process exited with code 127.

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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