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@ 2015-11-30T12:53:09Z

<?php

        echo preg_replace_callback('/(ä)|(ö)|(ü)|(Ä)|(Ö)|(Ü)|(ß)/', 'äöüÄÖÜß', function($matches){
            foreach($matches as &$match){
                switch($match){
                    case 'ü':
                        $match = 'ue';
                        break;
                    case 'ö':
                        $match = 'oe';
                        break;
                    case 'ä':
                        $match = 'ae';
                        break;
                    case 'Ü':
                        $match = 'Ue';
                        break;
                    case 'Ö':
                        $match = 'Oe';
                        break;
                    case 'Ä':
                        $match = 'Ae';
                        break;
                    case 'ß':
                        $match = 'ss';
                        break;
                }
            }
        });

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, function "äöüÄÖÜß" not found or invalid function name in /in/jsCZq:3 Stack trace: #0 /in/jsCZq(3): preg_replace_callback('/(\xC3\xA4)|(\xC3\xB6)|(\xC3\xBC)...', '\xC3\xA4\xC3\xB6\xC3\xBC\xC3\x84\xC3\x96\xC3\x9C\xC3\x9F', Object(Closure)) #1 {main} thrown in /in/jsCZq 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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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