3v4l.org

run code in 300+ PHP versions simultaneously
<?php $utmStr = 'http://vk.com/?utm_source=yandex&utm_medium=cpc&utm_campaign={campaign_id}&utm_content={ad_id}&utm_term={keyword}'; $start = strpos($utmStr, 'medium') + 7; $end = stripos($utmStr, 'utm', $start); $my = substr($utmStr, $start, $end); var_dump($my);
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.2.19, 8.3.0 - 8.3.7
string(48) "cpc&utm_campaign={campaign_id}&utm_content={ad_i"
preferences:
201.58 ms | 404 KiB | 227 Q