3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var = unserialize('a:11:{i:0;s:55:"all-in-one-event-calendar/all-in-one-event-calendar.php";i:1;s:36:"contact-form-7/wp-contact-form-7.php";i:2;s:31:"cookie-notice/cookie-notice.php";i:3;s:31:"hueman-addons/hueman-addons.php";i:4;s:27:"js_composer/js_composer.php";i:5;s:47:"really-simple-captcha/really-simple-captcha.php";i:6;s:55:"ts-visual-composer-extend/ts-visual-composer-extend.php";i:7;s:24:"wordpress-seo/wp-seo.php";i:8;s:27:"wp-super-cache/wp-cache.php";i:9;s:31:"wpdiscuz/class.WpdiscuzCore.php";i:10;s:28:"wysija-newsletters/index.php";}'); unset($var[9]); var_dump(serialize($var));
based on njukc
Output for 5.6.0 - 7.3.0alpha1
string(489) "a:10:{i:0;s:55:"all-in-one-event-calendar/all-in-one-event-calendar.php";i:1;s:36:"contact-form-7/wp-contact-form-7.php";i:2;s:31:"cookie-notice/cookie-notice.php";i:3;s:31:"hueman-addons/hueman-addons.php";i:4;s:27:"js_composer/js_composer.php";i:5;s:47:"really-simple-captcha/really-simple-captcha.php";i:6;s:55:"ts-visual-composer-extend/ts-visual-composer-extend.php";i:7;s:24:"wordpress-seo/wp-seo.php";i:8;s:27:"wp-super-cache/wp-cache.php";i:10;s:28:"wysija-newsletters/index.php";}"