Online PHP editor | output for MdlZB

@ 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 8.5.0 - 8.5.3: Deprecated: chr(): Providing a value not in-between 0 and 255 is deprecated, this is because a byte value must be in the [0, 255] interval. The value used will be constrained using % 256 in /in/MdlZB on line 28 Deprecated: chr(): Providing a value not in-between 0 and 255 is deprecated, this is because a byte value must be in the [0, 255] interval. The value used will be constrained using % 256 in /in/MdlZB on line 28 Deprecated: chr(): Providing a value not in-between 0 and 255 is deprecated, this is because a byte value must be in the [0, 255] interval. The value used will be constrained using % 256 in /in/MdlZB on line 28 string(2) "h�"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18: string(2) "h�"

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