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@ 2015-11-18T11:39:41Z

<?php

function isArrayFieldSet(array $array, $field, $separator = '/')
{
	if (strpos($field, $separator) !== false) {
		$path = explode($separator, $field);
		$field = array_shift($path);

		if (!is_null($field) && isset($array[$field])) {
			if (count($path) > 0) {
				return isArrayFieldSet($array[$field], implode($separator, $path), $separator);
			}
			return true;
		} else {
			return false;
		}
	}

	return isset($array[$field]);
}


$array = [
	'a' => 'test',
	'b' => [
		'b2' => 123,
		'b3' => [
			'test' => true
		]
	]
];

$shouldPass = [
	'a',
	'b',
	'b/b2',
	'b/b3',
	'b/b3/test'
];

$shouldNotPass = [
	'c',
	'b/b1',
	'b/b2/bx',
	'b/b3/test/x',
	'c/L1',
	'a/k15',
];

foreach ($shouldPass as $test) { isArrayFieldSet($array, $test, '/'); }
foreach ($shouldNotPass as $test) { isArrayFieldSet($array, $test, '/'); }

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: isArrayFieldSet(): Argument #1 ($array) must be of type array, int given, called in /in/ehKEI on line 11 and defined in /in/ehKEI:3 Stack trace: #0 /in/ehKEI(11): isArrayFieldSet(123, 'bx', '/') #1 /in/ehKEI(11): isArrayFieldSet(Array, 'b2', '/') #2 /in/ehKEI(51): isArrayFieldSet(Array, 'b', '/') #3 {main} thrown in /in/ehKEI on line 3
Process exited with code 255.

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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