Online PHP editor | output for fsUvq

<?php var_dump(strlen('{"min_id":"518643202656612355","max_id":"518793071794892805","events":[{"id":"518643202656612355","source_ip":"88.86.120.233","program":"error","message":"Supervisor process rabbitmq-notifications_email_normal-00 crashed @ CLI: /home/users/slevomat/slevomat.cz/version/20150327150641/bin/cli-slevomat.php supervisor:crashmail","received_at":"2015-03-29T03:09:57+02:00","generated_at":"2015-03-29T05:03:22+02:00","display_received_at":"Mar 29 03:09:57","source_id":76716484,"source_name":"cvachtova.slevomat","hostname":"cvachtova.slevomat","severity":"Emergency","facility":"Kernel"},{"id":"518643204338528256","source_ip":"88.86.120.233","program":"error","message":"SgLogistics\\Api\\Exception\\InvalidAccess: Invalid or expired access token. <https://www9.slevomat.cz/log/exception-2015-03-29-03-10-22-c97acc32061a6f09550d24176a0713cb.html> @ <https://www.slevomat.cz/moda-a-styl'));