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@ 2016-08-08T06:51:55Z

<?php
$input = [
    'foo.bar',
    'foo.bar.baz',
    'foo.bar.qux',
    'foo.qux',
    'foo.quux',
    'bar.baz',
    'bar.qux',
    'qux.quux',
];
$output=[];
foreach ($input as $line){
    $keys = explode('.',$line);          //break each section into a key
    $val = true;                         //holds next value to add to array
    $localArray = [];                    //holds the array for this input line
    for($i=count($keys)-1; $i>=0; $i--){ //go in reverse order
        $localArray = [$keys[$i]=>$val]; //store previous value in array
        $val = $localArray;              //store the array we just built. it will be
                                         //the value of the next key
    }
    $output = array_merge_recursive($output,$localArray);
}
print_r($output);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [foo] => Array ( [bar] => Array ( [0] => 1 [baz] => 1 [qux] => 1 ) [qux] => 1 [quux] => 1 ) [bar] => Array ( [baz] => 1 [qux] => 1 ) [qux] => Array ( [quux] => 1 ) )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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