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@ 2022-03-15T23:28:02Z

<?php

function get_next_colid(string $id): string
{
    if ($id === '') {
        return "\0";
    }

    $chrs = str_split($id);
    $bytes = array_map(fn(string $chr): int => ord($chr), $chrs);

    $last = array_pop($bytes);
    $last++;
    $bytes[] = $last;
    $reveresed = array_reverse($bytes); 
    foreach($reveresed as $pos => $val) {
        if ($val > 255) {
            $reveresed[$pos] = 255;
            if (isset($reveresed[$pos+1])) {
                $reveresed[$pos+1] += ($val - 255);
            } else {
                $reveresed[$pos+1] = ($val - 255);
            }
        }
    }
    
    $bytes = array_reverse($reveresed);
    $chrs = array_map(fn(int $byte): string => chr($byte), $bytes);
    
    return join('', $chrs);
}

$s = '~';
for($i = 0; $i <= 1000; $i++) {
    $s = get_next_colid($s);
}

var_dump($s);

Output for rfc.property-hooks, git.master_jit, git.master: string(2) "h�"

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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