Online PHP editor | rfc for tKOvA

@ 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 git.master, git.master_jit, rfc.property-hooks: Warning: Undefined array key 1 in /in/tKOvA on line 21 NULL string(11) "1aaXl4vaeJU" string(11) "1aaXl4vaeJU"

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