Online PHP editor | output for SjRfI

@ 2019-03-06T12:56:20Z

<?php
$headers = <<<HEADERS
# Hello

## World

### Let's add

## Some headers

### Yay!

# Foo

## Bar

## Bar Again
HEADERS;

$levels = [];
echo preg_replace_callback(
        '~^(#+)\K~m',
        function($m) use (&$levels) {
            $hashes = strlen($m[1]);
            $index = $hashes - 1;
            $reduction = sizeof($levels) - $hashes;
            if (!isset($levels[$index])) {
                $levels[$index] = 1;
            } else {
                ++$levels[$index];
            }
            if ($reduction > 0) {
                $levels = array_slice($levels, 0, -$reduction);
            }
            return " " . implode('.', $levels);
        },
        $headers
    );

Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: # 1 Hello ## 1.1 World ### 1.1.1 Let's add ## 1.2 Some headers ### 1.2.1 Yay! # 2 Foo ## 2.1 Bar ## 2.2 Bar Again
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 # 1 Hello ## 1.1 World ### 1.1.1 Let's add ## 1.2 Some headers ### 1.2.1 Yay! # 2 Foo ## 2.1 Bar ## 2.2 Bar Again

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