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@ 2017-06-23T14:23:23Z

<?php

  function setValueInNestedArray(&$array, $path, $value, $delimiter = '.'){
    $pathSegments = explode($delimiter, $path);

    $currentNode = &$array;
    foreach($pathSegments as $pathSegment) {
      if(!is_array($currentNode[$pathSegment])) {
        $currentNode[$pathSegment] = [];
      }
      $currentNode = &$currentNode[$pathSegment];
    }
    $currentNode = $value;
  }
  
  function getValueInNestedArray($array, $path, $defaultValue, $delimiter = '.'){
    $pathSegments = explode($delimiter, $path);

    $pathExists = true;
    $currentNode = &$array;
    foreach($pathSegments as $pathSegment) {
      if(is_array($currentNode[$pathSegment])) {
        $currentNode = &$currentNode[$pathSegment];
      } else {
        $pathExists = false;
      }
    }
    return $pathExists ? $currentNode : $defaultValue;
  }
  
$arr =[];
setValueInNestedArray($arr, 'a.b.c.d', 'e');
print_r($arr);
print_r(getValueInNestedArray($arr, 'a', null));
print_r(getValueInNestedArray($arr, 'a.b.c.d', null));
print_r(getValueInNestedArray($arr, 'e.f.g', null));
?>

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined array key "a" in /in/hJUJX on line 8 Warning: Undefined array key "b" in /in/hJUJX on line 8 Warning: Undefined array key "c" in /in/hJUJX on line 8 Warning: Undefined array key "d" in /in/hJUJX on line 8 Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => e ) ) ) ) Array ( [b] => Array ( [c] => Array ( [d] => e ) ) ) Warning: Undefined array key "e" in /in/hJUJX on line 22 Warning: Undefined array key "f" in /in/hJUJX on line 22 Warning: Undefined array key "g" in /in/hJUJX on line 22

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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