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run code in 300+ PHP versions simultaneously

@ 2017-08-18T20:13:42Z

<?php
function um_youtube_id_from_url($url) {
    $pattern =
        '%^# Match any youtube URL
        (?:https?://)?  # Optional scheme. Either http or https
        (?:www\.)?      # Optional www subdomain
        (?:             # Group host alternatives
          youtu\.be/    # Either youtu.be,
        | youtube\.com  # or youtube.com
          (?:           # Group path alternatives
            /embed/     # Either /embed/
          | /v/         # or /v/
          | /watch\?v=  # or /watch\?v=
          )             # End path alternatives.
        )               # End host alternatives.
        ([\w-]{10,12})  # Allow 10-12 for 11 char youtube id.
        $%x'
        ;
    $result = preg_match($pattern, $url, $matches);
    if (false !== $result) {
        return $matches[1];
    }
    return false;
}
var_dump(um_youtube_id_from_url('<a href="https://www.youtube.com/watch?v=1aaXl4vaeJU">https://www.youtube.com/watch?v=1aaXl4vaeJU</a>'));
var_dump(um_youtube_id_from_url("https://www.youtube.com/watch?v=1aaXl4vaeJU"));
var_dump(um_youtube_id_from_url("https://www.youtube.com/v/1aaXl4vaeJU"));

Output for 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: Warning: Undefined array key 1 in /in/tKOvA on line 21 NULL string(11) "1aaXl4vaeJU" string(11) "1aaXl4vaeJU"
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 Warning: Undefined array key 1 in /in/tKOvA on line 21 NULL string(11) "1aaXl4vaeJU" string(11) "1aaXl4vaeJU"
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined offset: 1 in /in/tKOvA on line 21 NULL string(11) "1aaXl4vaeJU" string(11) "1aaXl4vaeJU"
Output for 7.3.32 - 7.3.33: NULL string(11) "1aaXl4vaeJU" string(11) "1aaXl4vaeJU"

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