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@ 2020-09-30T22:46:36Z

<?php

namespace Test;

function is_string($str)
{
    return false;
}

/**
 * @throws \ReflectionException
 */
function getReflectionFunction(string $functionName): \ReflectionFunction
{
    $qualifiedFunctionName = strpos($functionName, '\\') === false
        ? __NAMESPACE__ . '\\' . $functionName
        : $functionName;

    try {
        return new \ReflectionFunction($qualifiedFunctionName);
    } catch (\ReflectionException $e) {
        return new \ReflectionFunction($functionName);
    }
}

var_dump(getReflectionFunction('is_string')->inNamespace());        // true
var_dump(getReflectionFunction('is_string')->getNamespaceName());   // 'Test'

var_dump(getReflectionFunction('\\is_string')->inNamespace());      // false
var_dump(getReflectionFunction('\\is_string')->getNamespaceName()); // ''

Output for git.master, git.master_jit, rfc.property-hooks: bool(true) string(4) "Test" bool(false) string(0) ""

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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